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2020-04-11Cycles/Optix: Support building the optix kernels on demand.Ray Molenkamp
CMake: `WITH_CYCLES_DEVICE_OPTIX` did not respect `WITH_CYCLES_CUDA_BINARIES` causing the optix kernel to be always build at build time. Code: `device_optix.cpp` did not count on the optix kernel not existing in the default location. For this to work, one should have before starting blender 1) working nvcc environment 2) Optix SDK installed and the OPTIX_ROOT_DIR environment variable pointing to it which is not set by default Differential Revision: https://developer.blender.org/D7400 Reviewed By: Brecht
2020-04-09Shading: add Roughness input to Noise and Wave texture nodesBartosz Moniewski
Currently in fractal_noise functions, each subsequent octave doubles the frequency and reduces the amplitude by half. This patch introduces Roughness input to Noise and Wave nodes. This multiplier determines how quickly the amplitudes of the subsequent octaves decrease. Value of 0.5 will be the default, generating identical noise we had before. Values above 0.5 will increase influence of each octave resulting in more "rough" noise, most interesting pattern changes happen there. Values below 0.5 will result in more "smooth" noise. Differential Revision: https://developer.blender.org/D7065
2020-04-07Cleanup: refactor adaptive sampling to more easily change some parametersBrecht Van Lommel
No functional changes yet, this is work towards making CPU and GPU results match more closely.
2020-04-07Fix T74572: adaptive sampling not scaling AOVs correctlyBrecht Van Lommel
2020-04-01Cycles: AVX implantation of Perlin noise.OmarSquircleArt
This patch adds an AVX implementation of Perlin noise in Cycles. An avxi type was also added as a utility based on the respective type in Intel Embree. Only 3D and 4D noise were implemented, there is no benefit for utilizing AVX in 1D and 2D noise. The SSE trilinear interpolation function was used in the AVX implementation because there is no benefit from using AVX in interpolating the last three dimensions. Differential Revision: https://developer.blender.org/D6680
2020-03-27Fix Optix build error after recent changesDaniel Santana
Differential Revision: https://developer.blender.org/D7253
2020-03-27Cleanup: Silence uninitialized variable warningCharlie Jolly
2020-03-26Cycles: Restore cycles_cubin_cc to working orderRay Molenkamp
Reviewed by: brecht pmoursnv Differential Revision: https://developer.blender.org/D7136
2020-03-26Fix T74939: Random Walk subsurface appearance in OptiX does not match other ↵Patrick Mours
engines Random Walk subsurface scattering did look different with OptiX because transmittance is calculated based on the hit distance, but the OptiX implementation of `scene_intersect_local` would return the distance in world space, while the Cycles BVH version returns it in object space. This fixes the problem by simply skipping the object->world transforms in all the places using the result of `scene_intersect_local` with OptiX. Reviewed By: brecht Differential Revision: https://developer.blender.org/D7232
2020-03-24Cycles: slightly improve OpenCL performance by reordering SVM enum valuesBrecht Van Lommel
Ref T71479
2020-03-24Cycles: work around OpenCL performance regression after AOVs and vector rotateBrecht Van Lommel
We appear to be hitting some limit where adding any amount of code causes a significant performance regression, no matter what it does. To work around that a new node level was added. Ref T71479
2020-03-24Cleanup: remove unused Cycles kernel feature flags, replace by node levelsBrecht Van Lommel
2020-03-20Fix T74345: missing albedo for Cycles principled hair BSDFBrecht Van Lommel
2020-03-19Cleanup: `make format` after SortedIncludes changeDalai Felinto
2020-03-18Volumes: add render settings for volume datablockBrecht Van Lommel
* Space: volume density and step size in object or world space * Step Size: override automatic step size * Clipping: values below this are ignored for tighter volume bounds The last two are Cycles only currently. Ref T73201
2020-03-18Cycles: change volume step size controls, auto adjust based on voxel sizeBrecht Van Lommel
By default it will now set the step size to the voxel size for smoke and volume objects, and 1/10th the bounding box for procedural volume shaders. New settings are: * Scene render/preview step rate: to globally adjust detail and performance * Material step rate: multiplied with auto detected per-object step size * World step size: distance to steo for world shader Differential Revision: https://developer.blender.org/D1777
2020-03-18Cycles: support for different 3D transform per volume gridBrecht Van Lommel
This is not yet fully supported by automatic volume bounds but works fine in most cases that will have mostly matching bounds. Ref T73201
2020-03-12Cleanup: add device_texture for images, distinct from other global memoryBrecht Van Lommel
There was too much image texture specific stuff in device_memory, and too much code duplication between devices.
2020-03-11Cleanup: stop encoding image data type in slot indexBrecht Van Lommel
This is legacy code from when we had a fixed number of textures.
2020-03-11Cycles: disable RTTI only for OSL files, other libraries like OpenVDB need itBrecht Van Lommel
This is a bit weak since it's not entirely clear where the boundary is, but tested to build and pass tests on all platforms.
2020-03-11Fix Cycles incorrect result when compressing some 8 bit log colorspace imagesBrecht Van Lommel
Don't clamp and do premultiply after color space conversion.
2020-03-11Cleanup: clang-formatCampbell Barton
2020-03-10Cycles: Fixed Shadow and Mist passes with adaptive sampling.Stefan Werner
This also fixes a side-effect where turning on UV pass but leaving Shadow pass turned off destroyed the Combined pass.
2020-03-10Cycles: Using OpenCL popcount() in PMJ sampler.Stefan Werner
2020-03-08Fix T74537: Fixed out of bounds memory access in Cycles' PMJ sampler.Stefan Werner
2020-03-06Cleanup: tweak Cycles #includes in preparation for clang-format sortingBrecht Van Lommel
2020-03-05Adaptive Sampling for Cycles.Stefan Werner
This feature takes some inspiration from "RenderMan: An Advanced Path Tracing Architecture for Movie Rendering" and "A Hierarchical Automatic Stopping Condition for Monte Carlo Global Illumination" The basic principle is as follows: While samples are being added to a pixel, the adaptive sampler writes half of the samples to a separate buffer. This gives it two separate estimates of the same pixel, and by comparing their difference it estimates convergence. Once convergence drops below a given threshold, the pixel is considered done. When a pixel has not converged yet and needs more samples than the minimum, its immediate neighbors are also set to take more samples. This is done in order to more reliably detect sharp features such as caustics. A 3x3 box filter that is run periodically over the tile buffer is used for that purpose. After a tile has finished rendering, the values of all passes are scaled as if they were rendered with the full number of samples. This way, any code operating on these buffers, for example the denoiser, does not need to be changed for per-pixel sample counts. Reviewed By: brecht, #cycles Differential Revision: https://developer.blender.org/D4686
2020-03-02Cycles: add Progressive Multi-Jitter sampling patternStefan Werner
This sampling pattern is particularly suited to adaptive sampling, and will be used for that upcoming feature. Based on "Progressive Multi-Jittered Sample Sequences" by Per Christensen, Andrew Kensler and Charlie Kilpatrick. Ref D4686
2020-03-02Shading: Add invert option to Vector Rotate NodeCharlie Jolly
Checkbox to invert rotation angle, suggested by @simonthommes Differential Revision: https://developer.blender.org/D6932
2020-02-27Fix T74262: Cycles OpenCL error on some devices after recent changesBrecht Van Lommel
2020-02-27Fix unreported crash/assert in Cycles with volume render pass in viewportDalai Felinto
Bug introduced on e0085bfd24da.
2020-02-25Fix T74063: Cycles light pass viewport display wrong with saturated colorsBrecht Van Lommel
2020-02-25Cycles: move sss and diffuse transmission into diffuse passBrecht Van Lommel
This simplifies compositors setups and will be consistent with Eevee render passes from D6331. There's a continuum between these passes and it's not clear there is much advantage to having them available separately. Differential Revision: https://developer.blender.org/D6848
2020-02-24Fix T74169: Vector Rotate Node - Euler modes not working as intendedCharlie Jolly
Remove additional Euler modes for the time being, not working as intended, will add back if there is a need.
2020-02-19Fix T73938: Cycles Vertex Color wrong if no layer is specifiedPhilipp Oeser
The node would render black in this case (but should use the 'active_render' layer choosen in the object data properties -- this is now in line to how this is handled for e.g. UVs) This introduces ATTR_STD_VERTEX_COLOR and uses this thoughout, if no particular layer is specified in the node. Maniphest Tasks: T73938 Differential Revision: https://developer.blender.org/D6887
2020-02-18Fix Cycles Embree crash with AO shader local only optionBrecht Van Lommel
Ref T73778
2020-02-18Fix Cycles Embree test failures with shadow catcherBrecht Van Lommel
Ref T73778
2020-02-18Cleanup: compiler warningsBrecht Van Lommel
2020-02-18Cycles: Enabled quaternion motion blur with Embree.Stefan Werner
Bringing Embree's motion blur closer to Cycles' native blur. This requries Embree 3.8.0 or newer. Differential Revision: https://developer.blender.org/D6575
2020-02-17Fix: T73830 OSL not finding stdosl.h on linuxRay Molenkamp
This extends FindOpenShadingLanguage.cmake to also look for the location of stdosl.h and adds the path to the invocation of oslc to deal with the headers being in different locations a little better. Differential Revision: https://developer.blender.org/D6865 Reviewers: brecht
2020-02-17Cycles: Vector Rotate Node using Axis and Angle methodCharlie Jolly
This node provides the ability to rotate a vector around a `center` point using either `Axis Angle` , `Single Axis` or `Euler` methods. Reviewed By: #cycles, brecht Differential Revision: https://developer.blender.org/D3789
2020-02-17Shading: add direction modes and phase offset to wave texture nodeBartosz Moniewski
* Direction mode X, Y and Z to align with axes rather than diagonal or spherical as previously. X is the new default, existing files will use diagonal or spherical for compatibility. * Phase offset to offset the wave along its direction, for purposes like animation and distortion. https://developer.blender.org/D6382
2020-02-15Cleanup: fix compiler warningBrecht Van Lommel
2020-02-15Cleanup: clang-formatCampbell Barton
2020-02-15Shading: Extend Vector Math Node with Sin, Cos, Tan and Wrap functionsCharlie Jolly
This adds some extra functions recently added to the float Maths Node. Not all functions have been ported over in this patch. Also: + Tidy up menu + Change node color to match other vector nodes, this helps distinguish vector and float nodes in the tree + Move shared OSL functions to new header node_math.h Reviewed By: brecht Differential Revision: https://developer.blender.org/D6713
2020-02-12Cleanup: clang-formatCampbell Barton
2020-02-12Cleanup: Fix build warnings from OSL shader compilationRay Molenkamp
There were to copies of stdosl.h one from stock OSL and one in the cycles tree augmented with cycles specific closures. moved the cycles ones to stdcycles.h and copied the stock stdosl.h and accompanying headers from the OSL shader folder. for further details see D6812. Reviewed By: brecht Differential Revision: https://developer.blender.org/D6812
2020-02-11Cycles: Add support for denoising in the viewportPatrick Mours
The OptiX denoiser can be a great help when rendering in the viewport, since it is really fast and needs few samples to produce convincing results. This patch therefore adds support for using any Cycles denoiser in the viewport also (but only the OptiX one is selectable because the NLM one is too slow to be usable currently). It also adds support for denoising on a different device than rendering (so one can e.g. render with the CPU but denoise with OptiX). Reviewed By: #cycles, brecht Differential Revision: https://developer.blender.org/D6554
2020-02-11CLeanup: clang-formatCampbell Barton
2020-02-11Cleanup: extra semicolons, comma use, undeclared varsCampbell Barton
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