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

2 files changed, 4 insertions, 4 deletions

diff --git a/drivers/gles3/storage/material_storage.cpp b/drivers/gles3/storage/material_storage.cpp
index ebafdc88d8..53ab3d2367 100644
--- a/drivers/gles3/storage/material_storage.cpp
+++ b/drivers/gles3/storage/material_storage.cpp
@@ -3237,7 +3237,7 @@ void SceneShaderData::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;
@@ -3288,7 +3288,7 @@ void SceneShaderData::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;
@@ -3398,7 +3398,7 @@ bool SceneShaderData::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 SceneShaderData::get_native_source_code() const {
diff --git a/drivers/gles3/storage/material_storage.h b/drivers/gles3/storage/material_storage.h
index 9965d23070..32463d291b 100644
--- a/drivers/gles3/storage/material_storage.h
+++ b/drivers/gles3/storage/material_storage.h
@@ -286,7 +286,7 @@ struct SceneShaderData : public ShaderData {
 	bool uses_alpha;
 	bool uses_blend_alpha;
 	bool uses_alpha_clip;
-	bool uses_depth_pre_pass;
+	bool uses_depth_prepass_alpha;
 	bool uses_discard;
 	bool uses_roughness;
 	bool uses_normal;