diff options
| author | Brecht Van Lommel <brecht@blender.org> | 2021-09-20 17:16:11 +0300 |
|---|---|---|
| committer | Brecht Van Lommel <brecht@blender.org> | 2021-10-19 16:11:09 +0300 |
| commit | fd77a28031daff3122ded3a1cb37a7fb44feedf6 (patch) | |
| tree | f54967b7f5f1175555aa21d613137fe436d7fc8c /intern/cycles/kernel/kernel_types.h | |
| parent | d06828f0b8ebb083de59fd2cb8c5f8fe6af1da22 (diff) | |
Cycles: bake transparent shadows for hair
These transparent shadows can be expansive to evaluate. Especially on the
GPU they can lead to poor occupancy when only some pixels require many kernel
launches to trace and evaluate many layers of transparency.
Baked transparency allows tracing a single ray in many cases by accumulating
the throughput directly in the intersection program without recording hits
or evaluating shaders. Transparency is baked at curve vertices and
interpolated, for most shaders this will look practically the same as actual
shader evaluation.
Fixes T91428, performance regression with spring demo file due to transparent
hair, and makes it render significantly faster than Blender 2.93.
Differential Revision: https://developer.blender.org/D12880
Diffstat (limited to 'intern/cycles/kernel/kernel_types.h')
| -rw-r--r-- | intern/cycles/kernel/kernel_types.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/intern/cycles/kernel/kernel_types.h b/intern/cycles/kernel/kernel_types.h index edae158f403..fa8453b99cb 100644 --- a/intern/cycles/kernel/kernel_types.h +++ b/intern/cycles/kernel/kernel_types.h @@ -61,6 +61,15 @@ CCL_NAMESPACE_BEGIN #define ID_NONE (0.0f) #define PASS_UNUSED (~0) +#define INTEGRATOR_SHADOW_ISECT_SIZE_CPU 1024U +#define INTEGRATOR_SHADOW_ISECT_SIZE_GPU 4U + +#ifdef __KERNEL_CPU__ +# define INTEGRATOR_SHADOW_ISECT_SIZE INTEGRATOR_SHADOW_ISECT_SIZE_CPU +#else +# define INTEGRATOR_SHADOW_ISECT_SIZE INTEGRATOR_SHADOW_ISECT_SIZE_GPU +#endif + /* Kernel features */ #define __SOBOL__ #define __DPDU__ @@ -582,6 +591,7 @@ typedef enum AttributeStandard { ATTR_STD_VOLUME_VELOCITY, ATTR_STD_POINTINESS, ATTR_STD_RANDOM_PER_ISLAND, + ATTR_STD_SHADOW_TRANSPARENCY, ATTR_STD_NUM, ATTR_STD_NOT_FOUND = ~0 @@ -1452,6 +1462,7 @@ typedef enum DeviceKernel { DEVICE_KERNEL_SHADER_EVAL_DISPLACE, DEVICE_KERNEL_SHADER_EVAL_BACKGROUND, + DEVICE_KERNEL_SHADER_EVAL_CURVE_SHADOW_TRANSPARENCY, #define DECLARE_FILM_CONVERT_KERNEL(variant) \ DEVICE_KERNEL_FILM_CONVERT_##variant, DEVICE_KERNEL_FILM_CONVERT_##variant##_HALF_RGBA |