Adds the option to use DLSS Ray Reconstruction for viewport denoising
in Cycles. For this to work, scheduling is adjusted to continuously
reset samples (so that independent frames are rendered), pixel jitter
is forced on and the required denoising passes (color, depth, diffuse
albedo, specular albedo, normals, roughness, motion vectors, specular
motion vectors) are enabled.
DLSS expects those inputs in the form of CUDA textures, while Cycles
keeps passes in an interleaved buffer layout. The data therefore has to
be converted, for which specialized versions of the existing denoising
filter kernels are introduced, which read/write directly to temporary
CUDA textures that are managed in denoiser_dlss.cpp.
The integration of DLSS itself is done in a similar fashion to OptiX:
The DLSS SDK is pulled in for the type definitions, but the DLSS
implementation is loaded by the NVIDIA driver installed on the system.
Pull Request: https://projects.blender.org/blender/blender/pulls/153077
The new intersect_mnee kernel runs before shade_surface, and
shade_surface_mnee is eliminated. That large kernel was causing problems
for some GPU compilers.
MNEE state is packed into a shadow path state to avoid significantly
increasing the path state size. This shadow state is then either turned
into an actual shadow ray state or discarded in shade_surface.
MNEE was re-enabled on HIP RDNA2 as it works again now. Texture cache
misses now also work correctly with MNEE.
This adds some extra code to the regular shade_surface kernel even when
MNEE is not used, to use the MNEE sampled point instead of sampling a
light. But there seems to be no significant performance impact.
Co-authored-by: Sergey Sharybin <sergey@blender.org>
Pull Request: https://projects.blender.org/blender/blender/pulls/158698
This improves performance by 5-10% for various benchmark scenes and GPU
devices, while on others it's roughly the same. There is a performance
regression with Intel Arc A750 on Linux related to shadow queueing
overhead, that is planned to be fixed separately.
Another goal of this change is to sidestep GPU compiler bugs that seems
more likely to happen with bigger kernels, and to make it easier for the
texture cache to cancel and resume on cache miss.
A new shade_light_nee kernel was added, and shade_light was renamed to
shade_light_forward (following naming for MIS functions). The shade_light_nee
kernel is only used when the light does not have constant emission.
The shade_dedicate_light kernel no longer does any shading. A future
optimization may be to fold this into the intersect_dedicated_light kernel.
LightSample.uv was removed as shading no longer happens immediately. A new
LightPdf was added for the cases where only the pdf is needed, avoiding the
overhead of constructing a full LightSample. There may be more room to
shrink LightSample in future refactors.
The integrate state memory usage is increased by 1 float when not using the
light tree, for the light threshold. All other informating for shading is
reconstructed the shadow ray, including position, normal and uv.
Pull Request: https://projects.blender.org/blender/blender/pulls/152649
Null Scattering currently has performance and noise issues, and it will
take time to address them. For now add the previous Ray Marching back as
an option.
Co-authored-by: Brecht Van Lommel <brecht@blender.org>
Pull Request: https://projects.blender.org/blender/blender/pulls/146317
Experiments have shown that the OptiX denoiser performs best when
operating on images that have their origin at the top-left corner,
while Blender renders with the origin at the bottom-left corner.
Simply flipping the image vertically before and after denoising is a
relatively trivial operation, so this patch introduces this as an
additional preprocessing and postprocessing step for denoising when the
OptiX denoiser is used. Additionally, this patch also removes an unused
helper function, now that OptiX 8.0 is the minimum.
Pull Request: https://projects.blender.org/blender/blender/pulls/145358
Guide the probability to scatter in or transmit through the volume.
Only applied for primary rays.
Co-authored-by: Brecht Van Lommel <brecht@blender.org>
Updated Embree 4 library with GPU support is required for it to be
compiled - compatiblity with Embree 3 and Embree 4 without GPU support
is maintained.
Enabling hardware raytracing is an opt-in user setting for now.
Pull Request: https://projects.blender.org/blender/blender/pulls/106266
This patch adds two new kernels: SORT_BUCKET_PASS and SORT_WRITE_PASS. These replace PREFIX_SUM and SORTED_PATHS_ARRAY on supported devices (currently implemented on Metal, but will be trivial to enable on the other backends). The new kernels exploit sort partitioning (see D15331) by sorting each partition separately using local atomics. This can give an overall render speedup of 2-3% depending on architecture. As before, we fall back to the original non-partitioned sorting when the shader count is "too high".
Reviewed By: brecht
Differential Revision: https://developer.blender.org/D16909
This patch generalizes the OSL support in Cycles to include GPU
device types and adds an implementation for that in the OptiX
device. There are some caveats still, including simplified texturing
due to lack of OIIO on the GPU and a few missing OSL intrinsics.
Note that this is incomplete and missing an update to the OSL
library before being enabled! The implementation is already
committed now to simplify further development.
Maniphest Tasks: T101222
Differential Revision: https://developer.blender.org/D15902
Move MNEE to own kernel, separate from shader ray-tracing. This does introduce
the limitation that a shader can't use both MNEE and AO/bevel, but that seems
like the better trade-off for now.
We can experiment with bigger kernel organization changes later.
Differential Revision: https://developer.blender.org/D15070
* Replace license text in headers with SPDX identifiers.
* Remove specific license info from outdated readme.txt, instead leave details
to the source files.
* Add list of SPDX license identifiers used, and corresponding license texts.
* Update copyright dates while we're at it.
Ref D14069, T95597
Remove prefix of filenames that is the same as the folder name. This used
to help when #includes were using individual files, but now they are always
relative to the cycles root directory and so the prefixes are redundant.
For patches and branches, git merge and rebase should be able to detect the
renames and move over code to the right file.
2021-10-26 15:37:04 +02:00
Renamed from intern/cycles/device/device_kernel.cpp (Browse further)
