Merge pull request #61884 from Calinou/alpha-hash-use-opaque-pipeline

Use opaque rendering pipeline for alpha hash materials

drivers/gles3/storage/material_storage.cpp

@@ -3358,6 +3358,9 @@ void SceneShaderData::set_code(const String &p_code) {
 
 	actions.usage_flag_pointers["ALPHA"] = &uses_alpha;
 	actions.usage_flag_pointers["ALPHA_SCISSOR_THRESHOLD"] = &uses_alpha_clip;
+	// 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.usage_flag_pointers["SSS_STRENGTH"] = &uses_sss;

servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp

@@ -115,6 +115,9 @@ void SceneShaderForwardClustered::ShaderData::set_code(const String &p_code) {
 
 	actions.usage_flag_pointers["ALPHA"] = &uses_alpha;
 	actions.usage_flag_pointers["ALPHA_SCISSOR_THRESHOLD"] = &uses_alpha_clip;
+	// 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.usage_flag_pointers["SSS_STRENGTH"] = &uses_sss;

servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp

@@ -116,6 +116,9 @@ void SceneShaderForwardMobile::ShaderData::set_code(const String &p_code) {
 
 	actions.usage_flag_pointers["ALPHA"] = &uses_alpha;
 	actions.usage_flag_pointers["ALPHA_SCISSOR_THRESHOLD"] = &uses_alpha_clip;
+	// 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.usage_flag_pointers["SSS_STRENGTH"] = &uses_sss;