Commit: fd3943dbd5d95ec5d5dda24acf7646796280997f
Author: Brecht Van Lommel
Date: Thu Dec 15 21:29:56 2022 +0100
Branches: blender-v3.4-release
https://developer.blender.org/rBfd3943dbd5d95ec5d5dda24acf7646796280997f
Fix T103049: Cycles specular light leak regression
The logic here is not ideal but was unintentionally changed in refactoring
for path guiding, now restore it back to 3.3 behavior again.
===================================================================
M intern/cycles/kernel/closure/bsdf.h
M intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h
M intern/cycles/kernel/closure/bsdf_microfacet.h
M intern/cycles/kernel/closure/bsdf_microfacet_multi.h
===================================================================
diff --git a/intern/cycles/kernel/closure/bsdf.h
b/intern/cycles/kernel/closure/bsdf.h
index 71af68aa80e..10948d56b4b 100644
--- a/intern/cycles/kernel/closure/bsdf.h
+++ b/intern/cycles/kernel/closure/bsdf.h
@@ -578,11 +578,11 @@ ccl_device_inline
case CLOSURE_BSDF_MICROFACET_GGX_FRESNEL_ID:
case CLOSURE_BSDF_MICROFACET_GGX_CLEARCOAT_ID:
case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
- eval = bsdf_microfacet_ggx_eval(sc, sd->I, omega_in, pdf);
+ eval = bsdf_microfacet_ggx_eval(sc, sd->N, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID:
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_FRESNEL_ID:
- eval = bsdf_microfacet_multi_ggx_eval(sc, sd->I, omega_in, pdf,
&sd->lcg_state);
+ eval = bsdf_microfacet_multi_ggx_eval(sc, sd->N, sd->I, omega_in, pdf,
&sd->lcg_state);
break;
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID:
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_FRESNEL_ID:
@@ -590,10 +590,10 @@ ccl_device_inline
break;
case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
- eval = bsdf_microfacet_beckmann_eval(sc, sd->I, omega_in, pdf);
+ eval = bsdf_microfacet_beckmann_eval(sc, sd->N, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
- eval = bsdf_ashikhmin_shirley_eval(sc, sd->I, omega_in, pdf);
+ eval = bsdf_ashikhmin_shirley_eval(sc, sd->N, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
eval = bsdf_ashikhmin_velvet_eval(sc, sd->I, omega_in, pdf);
diff --git a/intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h
b/intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h
index 14a4094d485..db02dad3909 100644
--- a/intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h
+++ b/intern/cycles/kernel/closure/bsdf_ashikhmin_shirley.h
@@ -40,11 +40,13 @@ ccl_device_inline float
bsdf_ashikhmin_shirley_roughness_to_exponent(float rough
}
ccl_device_forceinline Spectrum bsdf_ashikhmin_shirley_eval(ccl_private const
ShaderClosure *sc,
+ const float3 Ng,
const float3 I,
const float3
omega_in,
ccl_private float
*pdf)
{
ccl_private const MicrofacetBsdf *bsdf = (ccl_private const MicrofacetBsdf
*)sc;
+ const float cosNgI = dot(Ng, omega_in);
float3 N = bsdf->N;
float NdotI = dot(N, I); /* in Cycles/OSL convention I is omega_out */
@@ -52,7 +54,8 @@ ccl_device_forceinline Spectrum
bsdf_ashikhmin_shirley_eval(ccl_private const Sh
float out = 0.0f;
- if (fmaxf(bsdf->alpha_x, bsdf->alpha_y) <= 1e-4f || !(NdotI > 0.0f && NdotO
> 0.0f)) {
+ if ((cosNgI < 0.0f) || fmaxf(bsdf->alpha_x, bsdf->alpha_y) <= 1e-4f ||
+ !(NdotI > 0.0f && NdotO > 0.0f)) {
*pdf = 0.0f;
return zero_spectrum();
}
@@ -210,7 +213,7 @@ ccl_device int bsdf_ashikhmin_shirley_sample(ccl_private
const ShaderClosure *sc
}
else {
/* leave the rest to eval */
- *eval = bsdf_ashikhmin_shirley_eval(sc, I, *omega_in, pdf);
+ *eval = bsdf_ashikhmin_shirley_eval(sc, N, I, *omega_in, pdf);
}
return label;
diff --git a/intern/cycles/kernel/closure/bsdf_microfacet.h
b/intern/cycles/kernel/closure/bsdf_microfacet.h
index 4eb7cd5df22..c4a49182c35 100644
--- a/intern/cycles/kernel/closure/bsdf_microfacet.h
+++ b/intern/cycles/kernel/closure/bsdf_microfacet.h
@@ -517,27 +517,30 @@ ccl_device Spectrum
bsdf_microfacet_ggx_eval_transmit(ccl_private const Microfac
}
ccl_device Spectrum bsdf_microfacet_ggx_eval(ccl_private const ShaderClosure
*sc,
+ const float3 Ng,
const float3 I,
const float3 omega_in,
ccl_private float *pdf)
{
ccl_private const MicrofacetBsdf *bsdf = (ccl_private const MicrofacetBsdf
*)sc;
+ const bool m_refractive = bsdf->type ==
CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID;
const float alpha_x = bsdf->alpha_x;
const float alpha_y = bsdf->alpha_y;
- const bool m_refractive = bsdf->type ==
CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID;
- const float3 N = bsdf->N;
- const float cosNO = dot(N, I);
- const float cosNI = dot(N, omega_in);
+ const float cosNgI = dot(Ng, omega_in);
- if (((cosNI < 0.0f) != m_refractive) || alpha_x * alpha_y <= 1e-7f) {
+ if (((cosNgI < 0.0f) != m_refractive) || alpha_x * alpha_y <= 1e-7f) {
*pdf = 0.0f;
return zero_spectrum();
}
- return (cosNI < 0.0f) ? bsdf_microfacet_ggx_eval_transmit(
- bsdf, N, I, omega_in, pdf, alpha_x, alpha_y,
cosNO, cosNI) :
- bsdf_microfacet_ggx_eval_reflect(
- bsdf, N, I, omega_in, pdf, alpha_x, alpha_y,
cosNO, cosNI);
+ const float3 N = bsdf->N;
+ const float cosNO = dot(N, I);
+ const float cosNI = dot(N, omega_in);
+
+ return (cosNgI < 0.0f) ? bsdf_microfacet_ggx_eval_transmit(
+ bsdf, N, I, omega_in, pdf, alpha_x, alpha_y,
cosNO, cosNI) :
+ bsdf_microfacet_ggx_eval_reflect(
+ bsdf, N, I, omega_in, pdf, alpha_x, alpha_y,
cosNO, cosNI);
}
ccl_device int bsdf_microfacet_ggx_sample(KernelGlobals kg,
@@ -942,23 +945,26 @@ ccl_device Spectrum
bsdf_microfacet_beckmann_eval_transmit(ccl_private const Mic
}
ccl_device Spectrum bsdf_microfacet_beckmann_eval(ccl_private const
ShaderClosure *sc,
+ const float3 Ng,
const float3 I,
const float3 omega_in,
ccl_private float *pdf)
{
ccl_private const MicrofacetBsdf *bsdf = (ccl_private const MicrofacetBsdf
*)sc;
+ const bool m_refractive = bsdf->type ==
CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID;
const float alpha_x = bsdf->alpha_x;
const float alpha_y = bsdf->alpha_y;
- const bool m_refractive = bsdf->type ==
CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID;
- const float3 N = bsdf->N;
- const float cosNO = dot(N, I);
- const float cosNI = dot(N, omega_in);
+ const float cosNgI = dot(Ng, omega_in);
- if (((cosNI < 0.0f) != m_refractive) || alpha_x * alpha_y <= 1e-7f) {
+ if (((cosNgI < 0.0f) != m_refractive) || alpha_x * alpha_y <= 1e-7f) {
*pdf = 0.0f;
return zero_spectrum();
}
+ const float3 N = bsdf->N;
+ const float cosNO = dot(N, I);
+ const float cosNI = dot(N, omega_in);
+
return (cosNI < 0.0f) ? bsdf_microfacet_beckmann_eval_transmit(
bsdf, N, I, omega_in, pdf, alpha_x, alpha_y,
cosNO, cosNI) :
bsdf_microfacet_beckmann_eval_reflect(
diff --git a/intern/cycles/kernel/closure/bsdf_microfacet_multi.h
b/intern/cycles/kernel/closure/bsdf_microfacet_multi.h
index 73cc0d292a1..5f7696c2152 100644
--- a/intern/cycles/kernel/closure/bsdf_microfacet_multi.h
+++ b/intern/cycles/kernel/closure/bsdf_microfacet_multi.h
@@ -416,14 +416,16 @@ ccl_device int
bsdf_microfacet_multi_ggx_refraction_setup(ccl_private Microfacet
}
ccl_device Spectrum bsdf_microfacet_multi_ggx_eval(ccl_private const
ShaderClosure *sc,
+ const float3 Ng,
const float3 I,
const float3 omega_in,
ccl_private float *pdf,
ccl_private uint *lcg_state)
{
ccl_private const MicrofacetBsdf *bsdf = (ccl_private const MicrofacetBsdf
*)sc;
+ const float cosNgI = dot(Ng, omega_in);
- if (bsdf->alpha_x * bsdf->alpha_y < 1e-7f) {
+ if ((cosNgI < 0.0f) || bsdf->alpha_x * bsdf->alpha_y < 1e-7f) {
*pdf = 0.0f;
return zero_spectrum();
}
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