[Bf-blender-cvs] [7b9e47a35e0] master: EEVEE: Fix Missing GGX multi-scattering on Glass BSDF
Clément Foucault
noreply at git.blender.org
Sat Sep 19 00:24:54 CEST 2020
Commit: 7b9e47a35e048071ee6f514ec8aba95caa69a7a8
Author: Clément Foucault
Date: Sat Sep 19 00:24:43 2020 +0200
Branches: master
https://developer.blender.org/rB7b9e47a35e048071ee6f514ec8aba95caa69a7a8
EEVEE: Fix Missing GGX multi-scattering on Glass BSDF
Oversight that should have been in rB6f3c279d9e70
===================================================================
M source/blender/gpu/shaders/material/gpu_shader_material_glass.glsl
M source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
===================================================================
diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_glass.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_glass.glsl
index 6d782ff18de..c328b4800bc 100644
--- a/source/blender/gpu/shaders/material/gpu_shader_material_glass.glsl
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_glass.glsl
@@ -1,6 +1,11 @@
#ifndef VOLUMETRICS
-void node_bsdf_glass(
- vec4 color, float roughness, float ior, vec3 N, float ssr_id, out Closure result)
+void node_bsdf_glass(vec4 color,
+ float roughness,
+ float ior,
+ vec3 N,
+ float use_multiscatter,
+ float ssr_id,
+ out Closure result)
{
N = normalize(N);
vec3 out_spec, out_refr, ssr_spec;
@@ -8,7 +13,9 @@ void node_bsdf_glass(
color.rgb; /* Simulate 2 transmission event */
eevee_closure_glass(N,
vec3(1.0),
- vec3(1.0),
+ /* HACK: Pass the multiscatter flag as the sign to not add closure
+ * variations or increase register usage. */
+ (use_multiscatter != 0.0) ? vec3(1.0) : -vec3(1.0),
int(ssr_id),
roughness,
1.0,
@@ -28,5 +35,5 @@ void node_bsdf_glass(
}
#else
/* Stub glass because it is not compatible with volumetrics. */
-# define node_bsdf_glass(a, b, c, d, e, f) (f = CLOSURE_DEFAULT)
+# define node_bsdf_glass(a, b, c, d, e, f, result) (result = CLOSURE_DEFAULT)
#endif
diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c b/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
index cab25c7ddd0..e0fcce6f617 100644
--- a/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
@@ -51,7 +51,15 @@ static int node_shader_gpu_bsdf_glass(GPUMaterial *mat,
GPU_material_flag_set(mat, GPU_MATFLAG_GLOSSY | GPU_MATFLAG_REFRACT);
- return GPU_stack_link(mat, node, "node_bsdf_glass", in, out, GPU_constant(&node->ssr_id));
+ float use_multi_scatter = (node->custom1 == SHD_GLOSSY_MULTI_GGX) ? 1.0f : 0.0f;
+
+ return GPU_stack_link(mat,
+ node,
+ "node_bsdf_glass",
+ in,
+ out,
+ GPU_constant(&use_multi_scatter),
+ GPU_constant(&node->ssr_id));
}
/* node type definition */
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