Fix default_texture_param in shader pipeline to support uniform arrays

15 files changed, 124 insertions, 59 deletions

diff --git a/servers/rendering/rasterizer_dummy.h b/servers/rendering/rasterizer_dummy.h
index 44e07a1853..cecb009aa0 100644
--- a/servers/rendering/rasterizer_dummy.h
+++ b/servers/rendering/rasterizer_dummy.h
@@ -293,8 +293,8 @@ public:
 	String shader_get_code(RID p_shader) const override { return ""; }
 	void shader_get_param_list(RID p_shader, List<PropertyInfo> *p_param_list) const override {}
 
-	void shader_set_default_texture_param(RID p_shader, const StringName &p_name, RID p_texture) override {}
-	RID shader_get_default_texture_param(RID p_shader, const StringName &p_name) const override { return RID(); }
+	void shader_set_default_texture_param(RID p_shader, const StringName &p_name, RID p_texture, int p_index) override {}
+	RID shader_get_default_texture_param(RID p_shader, const StringName &p_name, int p_index) const override { return RID(); }
 	Variant shader_get_param_default(RID p_material, const StringName &p_param) const override { return Variant(); }
 
 	RS::ShaderNativeSourceCode shader_get_native_source_code(RID p_shader) const override { return RS::ShaderNativeSourceCode(); };
diff --git a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
index b74d7f9c31..6ae76c9bf2 100644
--- a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
+++ b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
@@ -336,11 +336,20 @@ void SceneShaderForwardClustered::ShaderData::set_code(const String &p_code) {
 	valid = true;
 }
 
-void SceneShaderForwardClustered::ShaderData::set_default_texture_param(const StringName &p_name, RID p_texture) {
+void SceneShaderForwardClustered::ShaderData::set_default_texture_param(const StringName &p_name, RID p_texture, int p_index) {
 	if (!p_texture.is_valid()) {
-		default_texture_params.erase(p_name);
+		if (default_texture_params.has(p_name) && default_texture_params[p_name].has(p_index)) {
+			default_texture_params[p_name].erase(p_index);
+
+			if (default_texture_params[p_name].is_empty()) {
+				default_texture_params.erase(p_name);
+			}
+		}
 	} else {
-		default_texture_params[p_name] = p_texture;
+		if (!default_texture_params.has(p_name)) {
+			default_texture_params[p_name] = Map<int, RID>();
+		}
+		default_texture_params[p_name][p_index] = p_texture;
 	}
 }
 
diff --git a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.h b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.h
index b09bd7e065..f2a55939f4 100644
--- a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.h
+++ b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.h
@@ -135,7 +135,7 @@ public:
 		uint32_t ubo_size;
 
 		String code;
-		Map<StringName, RID> default_texture_params;
+		Map<StringName, Map<int, RID>> default_texture_params;
 
 		DepthDraw depth_draw;
 		DepthTest depth_test;
@@ -166,7 +166,7 @@ public:
 		uint32_t index = 0;
 
 		virtual void set_code(const String &p_Code);
-		virtual void set_default_texture_param(const StringName &p_name, RID p_texture);
+		virtual void set_default_texture_param(const StringName &p_name, RID p_texture, int p_index);
 		virtual void get_param_list(List<PropertyInfo> *p_param_list) const;
 		void get_instance_param_list(List<RendererStorage::InstanceShaderParam> *p_param_list) const;
 
diff --git a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
index 16d650a540..3a6c945052 100644
--- a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
+++ b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
@@ -325,11 +325,20 @@ void SceneShaderForwardMobile::ShaderData::set_code(const String &p_code) {
 	valid = true;
 }
 
-void SceneShaderForwardMobile::ShaderData::set_default_texture_param(const StringName &p_name, RID p_texture) {
+void SceneShaderForwardMobile::ShaderData::set_default_texture_param(const StringName &p_name, RID p_texture, int p_index) {
 	if (!p_texture.is_valid()) {
-		default_texture_params.erase(p_name);
+		if (default_texture_params.has(p_name) && default_texture_params[p_name].has(p_index)) {
+			default_texture_params[p_name].erase(p_index);
+
+			if (default_texture_params[p_name].is_empty()) {
+				default_texture_params.erase(p_name);
+			}
+		}
 	} else {
-		default_texture_params[p_name] = p_texture;
+		if (!default_texture_params.has(p_name)) {
+			default_texture_params[p_name] = Map<int, RID>();
+		}
+		default_texture_params[p_name][p_index] = p_texture;
 	}
 }
 
diff --git a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.h b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.h
index e1c10f0206..392fac1e3e 100644
--- a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.h
+++ b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.h
@@ -111,7 +111,7 @@ public:
 		uint32_t ubo_size;
 
 		String code;
-		Map<StringName, RID> default_texture_params;
+		Map<StringName, Map<int, RID>> default_texture_params;
 
 		DepthDraw depth_draw;
 		DepthTest depth_test;
@@ -141,7 +141,7 @@ public:
 		uint32_t index = 0;
 
 		virtual void set_code(const String &p_Code);
-		virtual void set_default_texture_param(const StringName &p_name, RID p_texture);
+		virtual void set_default_texture_param(const StringName &p_name, RID p_texture, int p_index);
 		virtual void get_param_list(List<PropertyInfo> *p_param_list) const;
 		void get_instance_param_list(List<RendererStorage::InstanceShaderParam> *p_param_list) const;
 
diff --git a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
index 13a3e814f6..81a662c6eb 100644
--- a/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp
@@ -2120,11 +2120,20 @@ void RendererCanvasRenderRD::ShaderData::set_code(const String &p_code) {
 	valid = true;
 }
 
-void RendererCanvasRenderRD::ShaderData::set_default_texture_param(const StringName &p_name, RID p_texture) {
+void RendererCanvasRenderRD::ShaderData::set_default_texture_param(const StringName &p_name, RID p_texture, int p_index) {
 	if (!p_texture.is_valid()) {
-		default_texture_params.erase(p_name);
+		if (default_texture_params.has(p_name) && default_texture_params[p_name].has(p_index)) {
+			default_texture_params[p_name].erase(p_index);
+
+			if (default_texture_params[p_name].is_empty()) {
+				default_texture_params.erase(p_name);
+			}
+		}
 	} else {
-		default_texture_params[p_name] = p_texture;
+		if (!default_texture_params.has(p_name)) {
+			default_texture_params[p_name] = Map<int, RID>();
+		}
+		default_texture_params[p_name][p_index] = p_texture;
 	}
 }
 
diff --git a/servers/rendering/renderer_rd/renderer_canvas_render_rd.h b/servers/rendering/renderer_rd/renderer_canvas_render_rd.h
index ec7d7e2854..26ccbd3bf5 100644
--- a/servers/rendering/renderer_rd/renderer_canvas_render_rd.h
+++ b/servers/rendering/renderer_rd/renderer_canvas_render_rd.h
@@ -173,14 +173,14 @@ class RendererCanvasRenderRD : public RendererCanvasRender {
 		uint32_t ubo_size;
 
 		String code;
-		Map<StringName, RID> default_texture_params;
+		Map<StringName, Map<int, RID>> default_texture_params;
 
 		bool uses_screen_texture = false;
 		bool uses_sdf = false;
 		bool uses_time = false;
 
 		virtual void set_code(const String &p_Code);
-		virtual void set_default_texture_param(const StringName &p_name, RID p_texture);
+		virtual void set_default_texture_param(const StringName &p_name, RID p_texture, int p_index);
 		virtual void get_param_list(List<PropertyInfo> *p_param_list) const;
 		virtual void get_instance_param_list(List<RendererStorage::InstanceShaderParam> *p_param_list) const;
 
diff --git a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
index 9441c7cfb5..b8e9f40bc4 100644
--- a/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_scene_render_rd.cpp
@@ -3558,11 +3558,20 @@ void RendererSceneRenderRD::FogShaderData::set_code(const String &p_code) {
 	valid = true;
 }
 
-void RendererSceneRenderRD::FogShaderData::set_default_texture_param(const StringName &p_name, RID p_texture) {
+void RendererSceneRenderRD::FogShaderData::set_default_texture_param(const StringName &p_name, RID p_texture, int p_index) {
 	if (!p_texture.is_valid()) {
-		default_texture_params.erase(p_name);
+		if (default_texture_params.has(p_name) && default_texture_params[p_name].has(p_index)) {
+			default_texture_params[p_name].erase(p_index);
+
+			if (default_texture_params[p_name].is_empty()) {
+				default_texture_params.erase(p_name);
+			}
+		}
 	} else {
-		default_texture_params[p_name] = p_texture;
+		if (!default_texture_params.has(p_name)) {
+			default_texture_params[p_name] = Map<int, RID>();
+		}
+		default_texture_params[p_name][p_index] = p_texture;
 	}
 }
 
diff --git a/servers/rendering/renderer_rd/renderer_scene_render_rd.h b/servers/rendering/renderer_rd/renderer_scene_render_rd.h
index baa0144d43..740e0e75ce 100644
--- a/servers/rendering/renderer_rd/renderer_scene_render_rd.h
+++ b/servers/rendering/renderer_rd/renderer_scene_render_rd.h
@@ -879,12 +879,12 @@ private:
 
 		String path;
 		String code;
-		Map<StringName, RID> default_texture_params;
+		Map<StringName, Map<int, RID>> default_texture_params;
 
 		bool uses_time;
 
 		virtual void set_code(const String &p_Code);
-		virtual void set_default_texture_param(const StringName &p_name, RID p_texture);
+		virtual void set_default_texture_param(const StringName &p_name, RID p_texture, int p_index);
 		virtual void get_param_list(List<PropertyInfo> *p_param_list) const;
 		virtual void get_instance_param_list(List<RendererStorage::InstanceShaderParam> *p_param_list) const;
 		virtual bool is_param_texture(const StringName &p_param) const;
diff --git a/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp b/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp
index ce41e191e2..a9c39fb937 100644
--- a/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_scene_sky_rd.cpp
@@ -137,11 +137,20 @@ void RendererSceneSkyRD::SkyShaderData::set_code(const String &p_code) {
 	valid = true;
 }
 
-void RendererSceneSkyRD::SkyShaderData::set_default_texture_param(const StringName &p_name, RID p_texture) {
+void RendererSceneSkyRD::SkyShaderData::set_default_texture_param(const StringName &p_name, RID p_texture, int p_index) {
 	if (!p_texture.is_valid()) {
-		default_texture_params.erase(p_name);
+		if (default_texture_params.has(p_name) && default_texture_params[p_name].has(p_index)) {
+			default_texture_params[p_name].erase(p_index);
+
+			if (default_texture_params[p_name].is_empty()) {
+				default_texture_params.erase(p_name);
+			}
+		}
 	} else {
-		default_texture_params[p_name] = p_texture;
+		if (!default_texture_params.has(p_name)) {
+			default_texture_params[p_name] = Map<int, RID>();
+		}
+		default_texture_params[p_name][p_index] = p_texture;
 	}
 }
 
diff --git a/servers/rendering/renderer_rd/renderer_scene_sky_rd.h b/servers/rendering/renderer_rd/renderer_scene_sky_rd.h
index 7f563c9bc4..8689395bea 100644
--- a/servers/rendering/renderer_rd/renderer_scene_sky_rd.h
+++ b/servers/rendering/renderer_rd/renderer_scene_sky_rd.h
@@ -118,7 +118,7 @@ private:
 
 		String path;
 		String code;
-		Map<StringName, RID> default_texture_params;
+		Map<StringName, Map<int, RID>> default_texture_params;
 
 		bool uses_time;
 		bool uses_position;
@@ -127,7 +127,7 @@ private:
 		bool uses_light;
 
 		virtual void set_code(const String &p_Code);
-		virtual void set_default_texture_param(const StringName &p_name, RID p_texture);
+		virtual void set_default_texture_param(const StringName &p_name, RID p_texture, int p_index);
 		virtual void get_param_list(List<PropertyInfo> *p_param_list) const;
 		virtual void get_instance_param_list(List<RendererStorage::InstanceShaderParam> *p_param_list) const;
 		virtual bool is_param_texture(const StringName &p_param) const;
diff --git a/servers/rendering/renderer_rd/renderer_storage_rd.cpp b/servers/rendering/renderer_rd/renderer_storage_rd.cpp
index 5c7fee7ec9..64be176d24 100644
--- a/servers/rendering/renderer_rd/renderer_storage_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_storage_rd.cpp
@@ -1440,8 +1440,10 @@ void RendererStorageRD::shader_set_code(RID p_shader, const String &p_code) {
 		}
 
 		if (shader->data) {
-			for (const KeyValue<StringName, RID> &E : shader->default_texture_parameter) {
-				shader->data->set_default_texture_param(E.key, E.value);
+			for (const KeyValue<StringName, Map<int, RID>> &E : shader->default_texture_parameter) {
+				for (const KeyValue<int, RID> &E2 : E.value) {
+					shader->data->set_default_texture_param(E.key, E2.value, E2.key);
+				}
 			}
 		}
 	}
@@ -1471,17 +1473,26 @@ void RendererStorageRD::shader_get_param_list(RID p_shader, List<PropertyInfo> *
 	}
 }
 
-void RendererStorageRD::shader_set_default_texture_param(RID p_shader, const StringName &p_name, RID p_texture) {
+void RendererStorageRD::shader_set_default_texture_param(RID p_shader, const StringName &p_name, RID p_texture, int p_index) {
 	Shader *shader = shader_owner.get_or_null(p_shader);
 	ERR_FAIL_COND(!shader);
 
 	if (p_texture.is_valid() && texture_owner.owns(p_texture)) {
-		shader->default_texture_parameter[p_name] = p_texture;
+		if (!shader->default_texture_parameter.has(p_name)) {
+			shader->default_texture_parameter[p_name] = Map<int, RID>();
+		}
+		shader->default_texture_parameter[p_name][p_index] = p_texture;
 	} else {
-		shader->default_texture_parameter.erase(p_name);
+		if (shader->default_texture_parameter.has(p_name) && shader->default_texture_parameter[p_name].has(p_index)) {
+			shader->default_texture_parameter[p_name].erase(p_index);
+
+			if (shader->default_texture_parameter[p_name].is_empty()) {
+				shader->default_texture_parameter.erase(p_name);
+			}
+		}
 	}
 	if (shader->data) {
-		shader->data->set_default_texture_param(p_name, p_texture);
+		shader->data->set_default_texture_param(p_name, p_texture, p_index);
 	}
 	for (Set<Material *>::Element *E = shader->owners.front(); E; E = E->next()) {
 		Material *material = E->get();
@@ -1489,11 +1500,11 @@ void RendererStorageRD::shader_set_default_texture_param(RID p_shader, const Str
 	}
 }
 
-RID RendererStorageRD::shader_get_default_texture_param(RID p_shader, const StringName &p_name) const {
+RID RendererStorageRD::shader_get_default_texture_param(RID p_shader, const StringName &p_name, int p_index) const {
 	Shader *shader = shader_owner.get_or_null(p_shader);
 	ERR_FAIL_COND_V(!shader, RID());
-	if (shader->default_texture_parameter.has(p_name)) {
-		return shader->default_texture_parameter[p_name];
+	if (shader->default_texture_parameter.has(p_name) && shader->default_texture_parameter[p_name].has(p_index)) {
+		return shader->default_texture_parameter[p_name][p_index];
 	}
 
 	return RID();
@@ -2610,7 +2621,7 @@ RendererStorageRD::MaterialData::~MaterialData() {
 	}
 }
 
-void RendererStorageRD::MaterialData::update_textures(const Map<StringName, Variant> &p_parameters, const Map<StringName, RID> &p_default_textures, const Vector<ShaderCompilerRD::GeneratedCode::Texture> &p_texture_uniforms, RID *p_textures, bool p_use_linear_color) {
+void RendererStorageRD::MaterialData::update_textures(const Map<StringName, Variant> &p_parameters, const Map<StringName, Map<int, RID>> &p_default_textures, const Vector<ShaderCompilerRD::GeneratedCode::Texture> &p_texture_uniforms, RID *p_textures, bool p_use_linear_color) {
 	RendererStorageRD *singleton = (RendererStorageRD *)RendererStorage::base_singleton;
 #ifdef TOOLS_ENABLED
 	Texture *roughness_detect_texture = nullptr;
@@ -2673,19 +2684,19 @@ void RendererStorageRD::MaterialData::update_textures(const Map<StringName, Vari
 
 			if (uniform_array_size > 0) {
 				if (textures.size() < uniform_array_size) {
-					const Map<StringName, RID>::Element *W = p_default_textures.find(uniform_name);
+					const Map<StringName, Map<int, RID>>::Element *W = p_default_textures.find(uniform_name);
 					for (int j = textures.size(); j < uniform_array_size; j++) {
-						if (W) {
-							textures.push_back(W->get());
+						if (W && W->get().has(j)) {
+							textures.push_back(W->get()[j]);
 						} else {
 							textures.push_back(RID());
 						}
 					}
 				}
 			} else if (textures.is_empty()) {
-				const Map<StringName, RID>::Element *W = p_default_textures.find(uniform_name);
-				if (W) {
-					textures.push_back(W->get());
+				const Map<StringName, Map<int, RID>>::Element *W = p_default_textures.find(uniform_name);
+				if (W && W->get().has(0)) {
+					textures.push_back(W->get()[0]);
 				}
 			}
 		}
@@ -2833,7 +2844,7 @@ void RendererStorageRD::MaterialData::free_parameters_uniform_set(RID p_uniform_
 	}
 }
 
-bool RendererStorageRD::MaterialData::update_parameters_uniform_set(const Map<StringName, Variant> &p_parameters, bool p_uniform_dirty, bool p_textures_dirty, const Map<StringName, ShaderLanguage::ShaderNode::Uniform> &p_uniforms, const uint32_t *p_uniform_offsets, const Vector<ShaderCompilerRD::GeneratedCode::Texture> &p_texture_uniforms, const Map<StringName, RID> &p_default_texture_params, uint32_t p_ubo_size, RID &uniform_set, RID p_shader, uint32_t p_shader_uniform_set, uint32_t p_barrier) {
+bool RendererStorageRD::MaterialData::update_parameters_uniform_set(const Map<StringName, Variant> &p_parameters, bool p_uniform_dirty, bool p_textures_dirty, const Map<StringName, ShaderLanguage::ShaderNode::Uniform> &p_uniforms, const uint32_t *p_uniform_offsets, const Vector<ShaderCompilerRD::GeneratedCode::Texture> &p_texture_uniforms, const Map<StringName, Map<int, RID>> &p_default_texture_params, uint32_t p_ubo_size, RID &uniform_set, RID p_shader, uint32_t p_shader_uniform_set, uint32_t p_barrier) {
 	if ((uint32_t)ubo_data.size() != p_ubo_size) {
 		p_uniform_dirty = true;
 		if (uniform_buffer.is_valid()) {
@@ -5748,11 +5759,20 @@ void RendererStorageRD::ParticlesShaderData::set_code(const String &p_code) {
 	valid = true;
 }
 
-void RendererStorageRD::ParticlesShaderData::set_default_texture_param(const StringName &p_name, RID p_texture) {
+void RendererStorageRD::ParticlesShaderData::set_default_texture_param(const StringName &p_name, RID p_texture, int p_index) {
 	if (!p_texture.is_valid()) {
-		default_texture_params.erase(p_name);
+		if (default_texture_params.has(p_name) && default_texture_params[p_name].has(p_index)) {
+			default_texture_params[p_name].erase(p_index);
+
+			if (default_texture_params[p_name].is_empty()) {
+				default_texture_params.erase(p_name);
+			}
+		}
 	} else {
-		default_texture_params[p_name] = p_texture;
+		if (!default_texture_params.has(p_name)) {
+			default_texture_params[p_name] = Map<int, RID>();
+		}
+		default_texture_params[p_name][p_index] = p_texture;
 	}
 }
 
diff --git a/servers/rendering/renderer_rd/renderer_storage_rd.h b/servers/rendering/renderer_rd/renderer_storage_rd.h
index f13bd4a7f4..2cd3a01c66 100644
--- a/servers/rendering/renderer_rd/renderer_storage_rd.h
+++ b/servers/rendering/renderer_rd/renderer_storage_rd.h
@@ -135,7 +135,7 @@ public:
 
 	struct ShaderData {
 		virtual void set_code(const String &p_Code) = 0;
-		virtual void set_default_texture_param(const StringName &p_name, RID p_texture) = 0;
+		virtual void set_default_texture_param(const StringName &p_name, RID p_texture, int p_index) = 0;
 		virtual void get_param_list(List<PropertyInfo> *p_param_list) const = 0;
 
 		virtual void get_instance_param_list(List<InstanceShaderParam> *p_param_list) const = 0;
@@ -152,7 +152,7 @@ public:
 
 	struct MaterialData {
 		void update_uniform_buffer(const Map<StringName, ShaderLanguage::ShaderNode::Uniform> &p_uniforms, const uint32_t *p_uniform_offsets, const Map<StringName, Variant> &p_parameters, uint8_t *p_buffer, uint32_t p_buffer_size, bool p_use_linear_color);
-		void update_textures(const Map<StringName, Variant> &p_parameters, const Map<StringName, RID> &p_default_textures, const Vector<ShaderCompilerRD::GeneratedCode::Texture> &p_texture_uniforms, RID *p_textures, bool p_use_linear_color);
+		void update_textures(const Map<StringName, Variant> &p_parameters, const Map<StringName, Map<int, RID>> &p_default_textures, const Vector<ShaderCompilerRD::GeneratedCode::Texture> &p_texture_uniforms, RID *p_textures, bool p_use_linear_color);
 
 		virtual void set_render_priority(int p_priority) = 0;
 		virtual void set_next_pass(RID p_pass) = 0;
@@ -160,7 +160,7 @@ public:
 		virtual ~MaterialData();
 
 		//to be used internally by update_parameters, in the most common configuration of material parameters
-		bool update_parameters_uniform_set(const Map<StringName, Variant> &p_parameters, bool p_uniform_dirty, bool p_textures_dirty, const Map<StringName, ShaderLanguage::ShaderNode::Uniform> &p_uniforms, const uint32_t *p_uniform_offsets, const Vector<ShaderCompilerRD::GeneratedCode::Texture> &p_texture_uniforms, const Map<StringName, RID> &p_default_texture_params, uint32_t p_ubo_size, RID &uniform_set, RID p_shader, uint32_t p_shader_uniform_set, uint32_t p_barrier = RD::BARRIER_MASK_ALL);
+		bool update_parameters_uniform_set(const Map<StringName, Variant> &p_parameters, bool p_uniform_dirty, bool p_textures_dirty, const Map<StringName, ShaderLanguage::ShaderNode::Uniform> &p_uniforms, const uint32_t *p_uniform_offsets, const Vector<ShaderCompilerRD::GeneratedCode::Texture> &p_texture_uniforms, const Map<StringName, Map<int, RID>> &p_default_texture_params, uint32_t p_ubo_size, RID &uniform_set, RID p_shader, uint32_t p_shader_uniform_set, uint32_t p_barrier = RD::BARRIER_MASK_ALL);
 		void free_parameters_uniform_set(RID p_uniform_set);
 
 	private:
@@ -374,7 +374,7 @@ private:
 		ShaderData *data;
 		String code;
 		ShaderType type;
-		Map<StringName, RID> default_texture_parameter;
+		Map<StringName, Map<int, RID>> default_texture_parameter;
 		Set<Material *> owners;
 	};
 
@@ -883,14 +883,14 @@ private:
 
 		String path;
 		String code;
-		Map<StringName, RID> default_texture_params;
+		Map<StringName, Map<int, RID>> default_texture_params;
 
 		RID pipeline;
 
 		bool uses_time;
 
 		virtual void set_code(const String &p_Code);
-		virtual void set_default_texture_param(const StringName &p_name, RID p_texture);
+		virtual void set_default_texture_param(const StringName &p_name, RID p_texture, int p_index);
 		virtual void get_param_list(List<PropertyInfo> *p_param_list) const;
 		virtual void get_instance_param_list(List<RendererStorage::InstanceShaderParam> *p_param_list) const;
 		virtual bool is_param_texture(const StringName &p_param) const;
@@ -1414,8 +1414,8 @@ public:
 	String shader_get_code(RID p_shader) const;
 	void shader_get_param_list(RID p_shader, List<PropertyInfo> *p_param_list) const;
 
-	void shader_set_default_texture_param(RID p_shader, const StringName &p_name, RID p_texture);
-	RID shader_get_default_texture_param(RID p_shader, const StringName &p_name) const;
+	void shader_set_default_texture_param(RID p_shader, const StringName &p_name, RID p_texture, int p_index);
+	RID shader_get_default_texture_param(RID p_shader, const StringName &p_name, int p_index) const;
 	Variant shader_get_param_default(RID p_shader, const StringName &p_param) const;
 	void shader_set_data_request_function(ShaderType p_shader_type, ShaderDataRequestFunction p_function);
 
diff --git a/servers/rendering/renderer_storage.h b/servers/rendering/renderer_storage.h
index 2985e05e8f..8926bf24aa 100644
--- a/servers/rendering/renderer_storage.h
+++ b/servers/rendering/renderer_storage.h
@@ -183,8 +183,8 @@ public:
 	virtual String shader_get_code(RID p_shader) const = 0;
 	virtual void shader_get_param_list(RID p_shader, List<PropertyInfo> *p_param_list) const = 0;
 
-	virtual void shader_set_default_texture_param(RID p_shader, const StringName &p_name, RID p_texture) = 0;
-	virtual RID shader_get_default_texture_param(RID p_shader, const StringName &p_name) const = 0;
+	virtual void shader_set_default_texture_param(RID p_shader, const StringName &p_name, RID p_texture, int p_index) = 0;
+	virtual RID shader_get_default_texture_param(RID p_shader, const StringName &p_name, int p_index) const = 0;
 	virtual Variant shader_get_param_default(RID p_material, const StringName &p_param) const = 0;
 
 	virtual RS::ShaderNativeSourceCode shader_get_native_source_code(RID p_shader) const = 0;
diff --git a/servers/rendering/rendering_server_default.h b/servers/rendering/rendering_server_default.h
index 9a592a9265..f75bca600e 100644
--- a/servers/rendering/rendering_server_default.h
+++ b/servers/rendering/rendering_server_default.h
@@ -223,8 +223,8 @@ public:
 
 	FUNC2SC(shader_get_param_list, RID, List<PropertyInfo> *)
 
-	FUNC3(shader_set_default_texture_param, RID, const StringName &, RID)
-	FUNC2RC(RID, shader_get_default_texture_param, RID, const StringName &)
+	FUNC4(shader_set_default_texture_param, RID, const StringName &, RID, int)
+	FUNC3RC(RID, shader_get_default_texture_param, RID, const StringName &, int)
 	FUNC2RC(Variant, shader_get_param_default, RID, const StringName &)
 
 	FUNC1RC(ShaderNativeSourceCode, shader_get_native_source_code, RID)