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7434b8394897f31394f5cf66633f90c96ce1f790
blender/intern/cycles/kernel/closure/bsdf.h
Brecht Van Lommel e2e7f7ea52 Fix Cycles OptiX crash with 3D curves after point cloud changes 
Includes refactoring to reduce the number of bits taken by primitive types,
so they more easily fit in the OptiX limit.
2021-12-20 14:14:43 +01:00

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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
// clang-format off
#include "kernel/closure/bsdf_ashikhmin_velvet.h"
#include "kernel/closure/bsdf_diffuse.h"
#include "kernel/closure/bsdf_oren_nayar.h"
#include "kernel/closure/bsdf_phong_ramp.h"
#include "kernel/closure/bsdf_diffuse_ramp.h"
#include "kernel/closure/bsdf_microfacet.h"
#include "kernel/closure/bsdf_microfacet_multi.h"
#include "kernel/closure/bsdf_reflection.h"
#include "kernel/closure/bsdf_refraction.h"
#include "kernel/closure/bsdf_transparent.h"
#include "kernel/closure/bsdf_ashikhmin_shirley.h"
#include "kernel/closure/bsdf_toon.h"
#include "kernel/closure/bsdf_hair.h"
#include "kernel/closure/bsdf_hair_principled.h"
#include "kernel/closure/bsdf_principled_diffuse.h"
#include "kernel/closure/bsdf_principled_sheen.h"
#include "kernel/closure/bssrdf.h"
#include "kernel/closure/volume.h"
// clang-format on
CCL_NAMESPACE_BEGIN
/* Returns the square of the roughness of the closure if it has roughness,
* 0 for singular closures and 1 otherwise. */
ccl_device_inline float bsdf_get_specular_roughness_squared(ccl_private const ShaderClosure *sc)
{
if (CLOSURE_IS_BSDF_SINGULAR(sc->type)) {
return 0.0f;
}
if (CLOSURE_IS_BSDF_MICROFACET(sc->type)) {
ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)sc;
return bsdf->alpha_x * bsdf->alpha_y;
}
return 1.0f;
}
ccl_device_inline float bsdf_get_roughness_squared(ccl_private const ShaderClosure *sc)
{
/* This version includes diffuse, mainly for baking Principled BSDF
* where specular and metallic zero otherwise does not bake the
* specified roughness parameter. */
if (sc->type == CLOSURE_BSDF_OREN_NAYAR_ID) {
ccl_private OrenNayarBsdf *bsdf = (ccl_private OrenNayarBsdf *)sc;
return sqr(sqr(bsdf->roughness));
}
if (sc->type == CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID) {
ccl_private PrincipledDiffuseBsdf *bsdf = (ccl_private PrincipledDiffuseBsdf *)sc;
return sqr(sqr(bsdf->roughness));
}
if (CLOSURE_IS_BSDF_DIFFUSE(sc->type)) {
return 0.0f;
}
return bsdf_get_specular_roughness_squared(sc);
}
/* An additional term to smooth illumination on grazing angles when using bump mapping.
* Based on "Taming the Shadow Terminator" by Matt Jen-Yuan Chiang,
* Yining Karl Li and Brent Burley. */
ccl_device_inline float bump_shadowing_term(float3 Ng, float3 N, float3 I)
{
float g = safe_divide(dot(Ng, I), dot(N, I) * dot(Ng, N));
/* If the incoming light is on the unshadowed side, return full brightness. */
if (g >= 1.0f) {
return 1.0f;
}
/* If the incoming light points away from the surface, return black. */
if (g < 0.0f) {
return 0.0f;
}
/* Return smoothed value to avoid discontinuity at perpendicular angle. */
float g2 = sqr(g);
return -g2 * g + g2 + g;
}
/* Shadow terminator workaround, taken from Appleseed.
* Original code is under the MIT License
* Copyright (c) 2019 Francois Beaune, The appleseedhq Organization */
ccl_device_inline float shift_cos_in(float cos_in, const float frequency_multiplier)
{
cos_in = min(cos_in, 1.0f);
const float angle = fast_acosf(cos_in);
const float val = max(cosf(angle * frequency_multiplier), 0.0f) / cos_in;
return val;
}
ccl_device_inline int bsdf_sample(KernelGlobals kg,
ccl_private ShaderData *sd,
ccl_private const ShaderClosure *sc,
float randu,
float randv,
ccl_private float3 *eval,
ccl_private float3 *omega_in,
ccl_private differential3 *domega_in,
ccl_private float *pdf)
{
/* For curves use the smooth normal, particularly for ribbons the geometric
* normal gives too much darkening otherwise. */
int label;
const float3 Ng = (sd->type & PRIMITIVE_CURVE) ? sc->N : sd->Ng;
switch (sc->type) {
case CLOSURE_BSDF_DIFFUSE_ID:
label = bsdf_diffuse_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
#ifdef __SVM__
case CLOSURE_BSDF_OREN_NAYAR_ID:
label = bsdf_oren_nayar_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
# ifdef __OSL__
case CLOSURE_BSDF_PHONG_RAMP_ID:
label = bsdf_phong_ramp_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_DIFFUSE_RAMP_ID:
label = bsdf_diffuse_ramp_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
# endif
case CLOSURE_BSDF_TRANSLUCENT_ID:
label = bsdf_translucent_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_REFLECTION_ID:
label = bsdf_reflection_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_REFRACTION_ID:
label = bsdf_refraction_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_TRANSPARENT_ID:
label = bsdf_transparent_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_MICROFACET_GGX_ID:
case CLOSURE_BSDF_MICROFACET_GGX_FRESNEL_ID:
case CLOSURE_BSDF_MICROFACET_GGX_CLEARCOAT_ID:
case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
label = bsdf_microfacet_ggx_sample(kg,
sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID:
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_FRESNEL_ID:
label = bsdf_microfacet_multi_ggx_sample(kg,
sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf,
&sd->lcg_state);
break;
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID:
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_FRESNEL_ID:
label = bsdf_microfacet_multi_ggx_glass_sample(kg,
sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf,
&sd->lcg_state);
break;
case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
label = bsdf_microfacet_beckmann_sample(kg,
sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
label = bsdf_ashikhmin_shirley_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
label = bsdf_ashikhmin_velvet_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_DIFFUSE_TOON_ID:
label = bsdf_diffuse_toon_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_GLOSSY_TOON_ID:
label = bsdf_glossy_toon_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_HAIR_REFLECTION_ID:
label = bsdf_hair_reflection_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_HAIR_TRANSMISSION_ID:
label = bsdf_hair_transmission_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_HAIR_PRINCIPLED_ID:
label = bsdf_principled_hair_sample(
kg, sc, sd, randu, randv, eval, omega_in, &domega_in->dx, &domega_in->dy, pdf);
break;
# ifdef __PRINCIPLED__
case CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID:
label = bsdf_principled_diffuse_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
case CLOSURE_BSDF_PRINCIPLED_SHEEN_ID:
label = bsdf_principled_sheen_sample(sc,
Ng,
sd->I,
sd->dI.dx,
sd->dI.dy,
randu,
randv,
eval,
omega_in,
&domega_in->dx,
&domega_in->dy,
pdf);
break;
# endif /* __PRINCIPLED__ */
#endif
default:
label = LABEL_NONE;
break;
}
/* Test if BSDF sample should be treated as transparent for background. */
if (label & LABEL_TRANSMIT) {
float threshold_squared = kernel_data.background.transparent_roughness_squared_threshold;
if (threshold_squared >= 0.0f && !(label & LABEL_DIFFUSE)) {
if (bsdf_get_specular_roughness_squared(sc) <= threshold_squared) {
label |= LABEL_TRANSMIT_TRANSPARENT;
}
}
}
else {
/* Shadow terminator offset. */
const float frequency_multiplier =
kernel_tex_fetch(__objects, sd->object).shadow_terminator_shading_offset;
if (frequency_multiplier > 1.0f) {
*eval *= shift_cos_in(dot(*omega_in, sc->N), frequency_multiplier);
}
if (label & LABEL_DIFFUSE) {
if (!isequal_float3(sc->N, sd->N)) {
*eval *= bump_shadowing_term((label & LABEL_TRANSMIT) ? -sd->N : sd->N, sc->N, *omega_in);
}
}
}
return label;
}
#ifndef __KERNEL_CUDA__
ccl_device
#else
ccl_device_inline
#endif
float3
bsdf_eval(KernelGlobals kg,
ccl_private ShaderData *sd,
ccl_private const ShaderClosure *sc,
const float3 omega_in,
const bool is_transmission,
ccl_private float *pdf)
{
float3 eval = zero_float3();
if (!is_transmission) {
switch (sc->type) {
case CLOSURE_BSDF_DIFFUSE_ID:
eval = bsdf_diffuse_eval_reflect(sc, sd->I, omega_in, pdf);
break;
#ifdef __SVM__
case CLOSURE_BSDF_OREN_NAYAR_ID:
eval = bsdf_oren_nayar_eval_reflect(sc, sd->I, omega_in, pdf);
break;
# ifdef __OSL__
case CLOSURE_BSDF_PHONG_RAMP_ID:
eval = bsdf_phong_ramp_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_DIFFUSE_RAMP_ID:
eval = bsdf_diffuse_ramp_eval_reflect(sc, sd->I, omega_in, pdf);
break;
# endif
case CLOSURE_BSDF_TRANSLUCENT_ID:
eval = bsdf_translucent_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_REFLECTION_ID:
eval = bsdf_reflection_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_REFRACTION_ID:
eval = bsdf_refraction_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_TRANSPARENT_ID:
eval = bsdf_transparent_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_MICROFACET_GGX_ID:
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_reflect(sc, 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_reflect(sc, 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:
eval = bsdf_microfacet_multi_ggx_glass_eval_reflect(
sc, sd->I, omega_in, pdf, &sd->lcg_state);
break;
case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
eval = bsdf_microfacet_beckmann_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
eval = bsdf_ashikhmin_shirley_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
eval = bsdf_ashikhmin_velvet_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_DIFFUSE_TOON_ID:
eval = bsdf_diffuse_toon_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_GLOSSY_TOON_ID:
eval = bsdf_glossy_toon_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_HAIR_PRINCIPLED_ID:
eval = bsdf_principled_hair_eval(kg, sd, sc, omega_in, pdf);
break;
case CLOSURE_BSDF_HAIR_REFLECTION_ID:
eval = bsdf_hair_reflection_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_HAIR_TRANSMISSION_ID:
eval = bsdf_hair_transmission_eval_reflect(sc, sd->I, omega_in, pdf);
break;
# ifdef __PRINCIPLED__
case CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID:
eval = bsdf_principled_diffuse_eval_reflect(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_PRINCIPLED_SHEEN_ID:
eval = bsdf_principled_sheen_eval_reflect(sc, sd->I, omega_in, pdf);
break;
# endif /* __PRINCIPLED__ */
#endif
default:
break;
}
if (CLOSURE_IS_BSDF_DIFFUSE(sc->type)) {
if (!isequal_float3(sc->N, sd->N)) {
eval *= bump_shadowing_term(sd->N, sc->N, omega_in);
}
}
/* Shadow terminator offset. */
const float frequency_multiplier =
kernel_tex_fetch(__objects, sd->object).shadow_terminator_shading_offset;
if (frequency_multiplier > 1.0f) {
eval *= shift_cos_in(dot(omega_in, sc->N), frequency_multiplier);
}
}
else {
switch (sc->type) {
case CLOSURE_BSDF_DIFFUSE_ID:
eval = bsdf_diffuse_eval_transmit(sc, sd->I, omega_in, pdf);
break;
#ifdef __SVM__
case CLOSURE_BSDF_OREN_NAYAR_ID:
eval = bsdf_oren_nayar_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_TRANSLUCENT_ID:
eval = bsdf_translucent_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_REFLECTION_ID:
eval = bsdf_reflection_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_REFRACTION_ID:
eval = bsdf_refraction_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_TRANSPARENT_ID:
eval = bsdf_transparent_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_MICROFACET_GGX_ID:
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_transmit(sc, 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_transmit(sc, 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:
eval = bsdf_microfacet_multi_ggx_glass_eval_transmit(
sc, sd->I, omega_in, pdf, &sd->lcg_state);
break;
case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
eval = bsdf_microfacet_beckmann_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
eval = bsdf_ashikhmin_shirley_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_ASHIKHMIN_VELVET_ID:
eval = bsdf_ashikhmin_velvet_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_DIFFUSE_TOON_ID:
eval = bsdf_diffuse_toon_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_GLOSSY_TOON_ID:
eval = bsdf_glossy_toon_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_HAIR_PRINCIPLED_ID:
eval = bsdf_principled_hair_eval(kg, sd, sc, omega_in, pdf);
break;
case CLOSURE_BSDF_HAIR_REFLECTION_ID:
eval = bsdf_hair_reflection_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_HAIR_TRANSMISSION_ID:
eval = bsdf_hair_transmission_eval_transmit(sc, sd->I, omega_in, pdf);
break;
# ifdef __PRINCIPLED__
case CLOSURE_BSDF_PRINCIPLED_DIFFUSE_ID:
eval = bsdf_principled_diffuse_eval_transmit(sc, sd->I, omega_in, pdf);
break;
case CLOSURE_BSDF_PRINCIPLED_SHEEN_ID:
eval = bsdf_principled_sheen_eval_transmit(sc, sd->I, omega_in, pdf);
break;
# endif /* __PRINCIPLED__ */
#endif
default:
break;
}
if (CLOSURE_IS_BSDF_DIFFUSE(sc->type)) {
if (!isequal_float3(sc->N, sd->N)) {
eval *= bump_shadowing_term(-sd->N, sc->N, omega_in);
}
}
}
return eval;
}
ccl_device void bsdf_blur(KernelGlobals kg, ccl_private ShaderClosure *sc, float roughness)
{
/* TODO: do we want to blur volume closures? */
#ifdef __SVM__
switch (sc->type) {
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_ID:
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_FRESNEL_ID:
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_ID:
case CLOSURE_BSDF_MICROFACET_MULTI_GGX_GLASS_FRESNEL_ID:
bsdf_microfacet_multi_ggx_blur(sc, roughness);
break;
case CLOSURE_BSDF_MICROFACET_GGX_ID:
case CLOSURE_BSDF_MICROFACET_GGX_FRESNEL_ID:
case CLOSURE_BSDF_MICROFACET_GGX_CLEARCOAT_ID:
case CLOSURE_BSDF_MICROFACET_GGX_REFRACTION_ID:
bsdf_microfacet_ggx_blur(sc, roughness);
break;
case CLOSURE_BSDF_MICROFACET_BECKMANN_ID:
case CLOSURE_BSDF_MICROFACET_BECKMANN_REFRACTION_ID:
bsdf_microfacet_beckmann_blur(sc, roughness);
break;
case CLOSURE_BSDF_ASHIKHMIN_SHIRLEY_ID:
bsdf_ashikhmin_shirley_blur(sc, roughness);
break;
case CLOSURE_BSDF_HAIR_PRINCIPLED_ID:
bsdf_principled_hair_blur(sc, roughness);
break;
default:
break;
}
#endif
}
CCL_NAMESPACE_END
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