Ignore depth draw optimization when using depth draw alpha prepass

This is necessary as the scene shader still uses alpha in this case so we can't discard fragments that weren't written to the depth buffer

3 files changed, 6 insertions, 6 deletions

diff --git a/servers/rendering/renderer_rd/forward_mobile/render_forward_mobile.cpp b/servers/rendering/renderer_rd/forward_mobile/render_forward_mobile.cpp
index 53bcb1c038..7904ea0527 100644
--- a/servers/rendering/renderer_rd/forward_mobile/render_forward_mobile.cpp
+++ b/servers/rendering/renderer_rd/forward_mobile/render_forward_mobile.cpp
@@ -2378,7 +2378,7 @@ void RenderForwardMobile::_geometry_instance_add_surface_with_material(GeometryI
 	if (has_alpha || has_read_screen_alpha || p_material->shader_data->depth_draw == SceneShaderForwardMobile::ShaderData::DEPTH_DRAW_DISABLED || p_material->shader_data->depth_test == SceneShaderForwardMobile::ShaderData::DEPTH_TEST_DISABLED) {
 		//material is only meant for alpha pass
 		flags |= GeometryInstanceSurfaceDataCache::FLAG_PASS_ALPHA;
-		if (p_material->shader_data->uses_depth_pre_pass && !(p_material->shader_data->depth_draw == SceneShaderForwardMobile::ShaderData::DEPTH_DRAW_DISABLED || p_material->shader_data->depth_test == SceneShaderForwardMobile::ShaderData::DEPTH_TEST_DISABLED)) {
+		if (p_material->shader_data->uses_depth_prepass_alpha && !(p_material->shader_data->depth_draw == SceneShaderForwardMobile::ShaderData::DEPTH_DRAW_DISABLED || p_material->shader_data->depth_test == SceneShaderForwardMobile::ShaderData::DEPTH_TEST_DISABLED)) {
 			flags |= GeometryInstanceSurfaceDataCache::FLAG_PASS_DEPTH;
 			flags |= GeometryInstanceSurfaceDataCache::FLAG_PASS_SHADOW;
 		}
@@ -2394,7 +2394,7 @@ void RenderForwardMobile::_geometry_instance_add_surface_with_material(GeometryI
 
 	SceneShaderForwardMobile::MaterialData *material_shadow = nullptr;
 	void *surface_shadow = nullptr;
-	if (!p_material->shader_data->uses_particle_trails && !p_material->shader_data->writes_modelview_or_projection && !p_material->shader_data->uses_vertex && !p_material->shader_data->uses_discard && !p_material->shader_data->uses_depth_pre_pass && !p_material->shader_data->uses_alpha_clip) {
+	if (!p_material->shader_data->uses_particle_trails && !p_material->shader_data->writes_modelview_or_projection && !p_material->shader_data->uses_vertex && !p_material->shader_data->uses_discard && !p_material->shader_data->uses_depth_prepass_alpha && !p_material->shader_data->uses_alpha_clip) {
 		flags |= GeometryInstanceSurfaceDataCache::FLAG_USES_SHARED_SHADOW_MATERIAL;
 		material_shadow = static_cast<SceneShaderForwardMobile::MaterialData *>(RendererRD::MaterialStorage::get_singleton()->material_get_data(scene_shader.default_material, RendererRD::MaterialStorage::SHADER_TYPE_3D));
 
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 224bb34189..543b1e29f9 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
@@ -63,7 +63,7 @@ void SceneShaderForwardMobile::ShaderData::set_code(const String &p_code) {
 	uses_alpha = false;
 	uses_alpha_clip = false;
 	uses_blend_alpha = false;
-	uses_depth_pre_pass = false;
+	uses_depth_prepass_alpha = false;
 	uses_discard = false;
 	uses_roughness = false;
 	uses_normal = false;
@@ -115,7 +115,7 @@ void SceneShaderForwardMobile::ShaderData::set_code(const String &p_code) {
 	// Use alpha clip pipeline for alpha hash/dither.
 	// This prevents sorting issues inherent to alpha blending and allows such materials to cast shadows.
 	actions.usage_flag_pointers["ALPHA_HASH_SCALE"] = &uses_alpha_clip;
-	actions.render_mode_flags["depth_prepass_alpha"] = &uses_depth_pre_pass;
+	actions.render_mode_flags["depth_prepass_alpha"] = &uses_depth_prepass_alpha;
 
 	// actions.usage_flag_pointers["SSS_STRENGTH"] = &uses_sss;
 	// actions.usage_flag_pointers["SSS_TRANSMITTANCE_DEPTH"] = &uses_transmittance;
@@ -341,7 +341,7 @@ bool SceneShaderForwardMobile::ShaderData::casts_shadows() const {
 	bool has_base_alpha = (uses_alpha && !uses_alpha_clip) || has_read_screen_alpha;
 	bool has_alpha = has_base_alpha || uses_blend_alpha;
 
-	return !has_alpha || (uses_depth_pre_pass && !(depth_draw == DEPTH_DRAW_DISABLED || depth_test == DEPTH_TEST_DISABLED));
+	return !has_alpha || (uses_depth_prepass_alpha && !(depth_draw == DEPTH_DRAW_DISABLED || depth_test == DEPTH_TEST_DISABLED));
 }
 
 RS::ShaderNativeSourceCode SceneShaderForwardMobile::ShaderData::get_native_source_code() const {
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 18a897a9e9..f90acf0247 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
@@ -114,7 +114,7 @@ public:
 		bool uses_alpha = false;
 		bool uses_blend_alpha = false;
 		bool uses_alpha_clip = false;
-		bool uses_depth_pre_pass = false;
+		bool uses_depth_prepass_alpha = false;
 		bool uses_discard = false;
 		bool uses_roughness = false;
 		bool uses_normal = false;