Eevee: Add Refraction via probes.

1 files changed, 24 insertions, 7 deletions

diff --git a/source/blender/gpu/shaders/gpu_shader_material.glsl b/source/blender/gpu/shaders/gpu_shader_material.glsl
index 416907c8453..a4e0f85b132 100644
--- a/source/blender/gpu/shaders/gpu_shader_material.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_material.glsl
@@ -2722,7 +2722,15 @@ void node_bsdf_anisotropic(
 
 void node_bsdf_glass(vec4 color, float roughness, float ior, vec3 N, out Closure result)
 {
+#ifdef EEVEE_ENGINE
+	vec3 ssr_spec;
+	roughness = sqrt(roughness);
+	vec3 L = eevee_surface_glass(N, vec3(1.0), roughness, ior, int(-2), ssr_spec);
+	vec3 vN = normalize(mat3(ViewMatrix) * N);
+	result = Closure(L * color.rgb, 1.0, vec4(ssr_spec * color.rgb, roughness), normal_encode(vN, viewCameraVec), int(-2));
+#else
 	node_bsdf_diffuse(color, 0.0, N, result);
+#endif
 }
 
 void node_bsdf_toon(vec4 color, float size, float tsmooth, vec3 N, out Closure result)
@@ -2881,8 +2889,9 @@ void node_bsdf_principled_clearcoat(vec4 base_color, float subsurface, vec3 subs
 	}
 	result = Closure(surface_color.rgb / surface_color.a, 1.0);
 #else
-
+	vec3 L_trans = (transmission <= 0.0) ? vec3(0.0) : eevee_surface_glass(N, base_color.rgb, roughness, ior, int(-2), ssr_spec);
 	vec3 L = eevee_surface_clearcoat_lit(N, diffuse, f0, roughness, CN, clearcoat, clearcoat_roughness, 1.0, int(ssr_id), ssr_spec);
+	L = mix(L, L_trans, transmission);
 	vec3 vN = normalize(mat3(ViewMatrix) * N);
 	result = Closure(L, 1.0, vec4(ssr_spec, roughness), normal_encode(vN, viewCameraVec), int(ssr_id));
 #endif
@@ -2896,7 +2905,7 @@ void node_bsdf_principled_clearcoat(vec4 base_color, float subsurface, vec3 subs
 
 void node_bsdf_translucent(vec4 color, vec3 N, out Closure result)
 {
-	node_bsdf_diffuse(color, 0.0, N, result);
+	node_bsdf_diffuse(color, 0.0, -N, result);
 }
 
 void node_bsdf_transparent(vec4 color, out Closure result)
@@ -2918,6 +2927,19 @@ void node_subsurface_scattering(
 	node_bsdf_diffuse(color, 0.0, N, result);
 }
 
+void node_bsdf_refraction(vec4 color, float roughness, float ior, vec3 N, out Closure result)
+{
+#ifdef EEVEE_ENGINE
+	vec3 ssr_spec;
+	roughness = sqrt(roughness);
+	vec3 L = eevee_surface_refraction(N, vec3(1.0), roughness, ior, int(-2), ssr_spec);
+	vec3 vN = normalize(mat3(ViewMatrix) * N);
+	result = Closure(L * color.rgb, 1.0, vec4(ssr_spec * color.rgb, roughness), normal_encode(vN, viewCameraVec), int(-2));
+#else
+	node_bsdf_diffuse(color, 0.0, N, result);
+#endif /* EEVEE_ENGINE */
+}
+
 /* Unsupported for now */
 #ifndef EEVEE_ENGINE
 void node_bsdf_hair(vec4 color, float offset, float roughnessu, float roughnessv, vec3 tangent, out Closure result)
@@ -2925,11 +2947,6 @@ void node_bsdf_hair(vec4 color, float offset, float roughnessu, float roughnessv
 	result = Closure(color.rgb, color.a);
 }
 
-void node_bsdf_refraction(vec4 color, float roughness, float ior, vec3 N, out Closure result)
-{
-	node_bsdf_diffuse(color, 0.0, N, result);
-}
-
 void node_ambient_occlusion(vec4 color, out Closure result)
 {
 	result = Closure(color.rgb, color.a);