Fix T63393 Eevee: Specular Shader's Clear Coat does not function

3 files changed, 21 insertions, 9 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_materials.c b/source/blender/draw/engines/eevee/eevee_materials.c
index ecfb601d00a..ae145546856 100644
--- a/source/blender/draw/engines/eevee/eevee_materials.c
+++ b/source/blender/draw/engines/eevee/eevee_materials.c
@@ -591,6 +591,7 @@ void EEVEE_materials_init(EEVEE_ViewLayerData *sldata,
                                               datatoc_lit_surface_frag_glsl,
                                               datatoc_lit_surface_frag_glsl,
                                               datatoc_lit_surface_frag_glsl,
+                                              datatoc_lit_surface_frag_glsl,
                                               datatoc_volumetric_lib_glsl);
 
     e_data.volume_shader_lib = BLI_string_joinN(datatoc_common_view_lib_glsl,
diff --git a/source/blender/draw/engines/eevee/shaders/lit_surface_frag.glsl b/source/blender/draw/engines/eevee/shaders/lit_surface_frag.glsl
index 7dba3738c12..c8b57c5dec2 100644
--- a/source/blender/draw/engines/eevee/shaders/lit_surface_frag.glsl
+++ b/source/blender/draw/engines/eevee/shaders/lit_surface_frag.glsl
@@ -44,6 +44,14 @@ uniform int hairThicknessRes = 1;
 #define CLOSURE_GLOSSY
 #endif /* SURFACE_DEFAULT */
 
+#if !defined(SURFACE_DEFAULT_CLEARCOAT) && !defined(CLOSURE_NAME)
+#define SURFACE_DEFAULT_CLEARCOAT
+#define CLOSURE_NAME eevee_closure_default_clearcoat
+#define CLOSURE_DIFFUSE
+#define CLOSURE_GLOSSY
+#define CLOSURE_CLEARCOAT
+#endif /* SURFACE_DEFAULT_CLEARCOAT */
+
 #if !defined(SURFACE_PRINCIPLED) && !defined(CLOSURE_NAME)
 #define SURFACE_PRINCIPLED
 #define CLOSURE_NAME eevee_closure_principled
diff --git a/source/blender/gpu/shaders/gpu_shader_material.glsl b/source/blender/gpu/shaders/gpu_shader_material.glsl
index 36c4138cefd..c64623eeaf7 100644
--- a/source/blender/gpu/shaders/gpu_shader_material.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_material.glsl
@@ -3428,15 +3428,18 @@ void node_eevee_specular(vec4 diffuse,
                          out Closure result)
 {
   vec3 out_diff, out_spec, ssr_spec;
-  eevee_closure_default(normal,
-                        diffuse.rgb,
-                        specular.rgb,
-                        int(ssr_id),
-                        roughness,
-                        occlusion,
-                        out_diff,
-                        out_spec,
-                        ssr_spec);
+  eevee_closure_default_clearcoat(normal,
+                                  diffuse.rgb,
+                                  specular.rgb,
+                                  int(ssr_id),
+                                  roughness,
+                                  clearcoat_normal,
+                                  clearcoat * 0.25,
+                                  clearcoat_roughness,
+                                  occlusion,
+                                  out_diff,
+                                  out_spec,
+                                  ssr_spec);
 
   vec3 vN = normalize(mat3(ViewMatrix) * normal);
   result = CLOSURE_DEFAULT;