Vulkan backend has recently switched to a render graph approach. Many
code was left so we could develop the render graph beside the previous
implementation. Last week we removed the switch. This PR will remove
most of the unused code. There might be some left and will be removed
when detected.
Pull Request: https://projects.blender.org/blender/blender/pulls/123422
Almost certainly not an issue in current codebase (this 'copy' version
of `MEM_cnew` does not seem much used in the first place), but better be
consistent with the 'allocating' version.
Pull Request: https://projects.blender.org/blender/blender/pulls/123445
Sync a bit better the checks on the alignment value between
`MEM_lockfree_mallocN_aligned` and `MEM_guarded_mallocN_aligned`.
The only significant change, in `MEM_guarded_mallocN_aligned`, is the
usage of `ALIGNED_MALLOC_MINIMUM_ALIGNMENT` instead of 'magic value' `8`.
This should not have any effect on 64bits platforms, but on 32bits ones
the minimum alignment would be reduced from `8` to `4` now.
NOTE: we could also consider making these checks part of a utils
function, instead of duplicating them in the codebase.
This patch implements a new Gabor noise node based on [1] but with the
improvements from [2] and the phasor formulation from [3].
We compare with the most popular existing implementation, that of OSL,
from the user's point of view:
- This implementation produces C1 continuous noise as opposed to the
non continuous OSL implementation, so it can be used for bump
mapping and is generally smother. This is achieved by windowing the
Gabor kernel using a Hann window.
- The Bandwidth input of OSL was hard-coded to 1 and was replaced with
a frequency input, which OSL hard codes to 2, since frequency is
more natural to control. This is even more true now that that Gabor
kernel is windowed as opposed to truncated, which means increasing
the bandwidth will just turn the Gaussian component of the Gabor
into a Hann window. While decreasing the bandwidth will eliminate
the harmonic from the Gabor kernel, which is the point of Gabor
noise.
- OSL had three discrete modes of operation for orienting the kernel.
Anisotropic, Isotropic, and a hybrid mode. While this implementation
provides a continuous Anisotropy parameter which users are already
familiar with from the Glossy BSDF node.
- This implementation provides not just the Gabor noise value, but
also its phase and intensity components. The Gabor noise value is
basically sin(phase) * intensity, but the phase is arguably more
useful since it does not suffer from the low contrast issues that
Gabor suffers from. While the intensity is useful to hide the
singularities in the phase.
- This implementation converges faster that OSL's relative to the
impulse count, so we fix the impulses count to 8 for simplicitly.
- This implementation does not implement anisotropic filtering.
Future improvements to the node includes implementing surface noise and
filtering. As well as extending the spectral control of the noise,
either by providing specialized kernels as was done in #110802, or by
providing some more procedural control over the frequencies of the
Gabor.
References:
[1]: Lagae, Ares, et al. "Procedural noise using sparse Gabor
convolution." ACM Transactions on Graphics (TOG) 28.3 (2009): 1-10.
[2]: Tavernier, Vincent, et al. "Making gabor noise fast and
normalized." Eurographics 2019-40th Annual Conference of the European
Association for Computer Graphics. 2019.
[3]: Tricard, Thibault, et al. "Procedural phasor noise." ACM
Transactions on Graphics (TOG) 38.4 (2019): 1-13.
Pull Request: https://projects.blender.org/blender/blender/pulls/121820
This multiscattering term comes from the OpenPBR specification and nicely
preserves energy while correctly modeling increased saturation at high
roughness.
Preparation for adding a diffuse roughness option to the Principled BSDF.
To me, the difference in output and computation seems small enough to
not need an enum for the old behavior.
Note that this also switches sampling to cosine-weighted, in my tests this
gives lower noise. I also checked doing MIS between cosine and uniform,
using the A term as a weight for how often to use cosine (since that term
is Lambertian diffuse), but always using cosine was better.
A nice consequence of that is that you don't get a huge noise jump when
going from 0.0 to 0.01 roughness.
Pull Request: https://projects.blender.org/blender/blender/pulls/123345
Cycles runs a check to see if the camera is possibly inside a
volumetric object by seeing if the bounding box of the camera
and volumetric object intersect.
If the calculation is wrong (Cycles says the camera is outside the
volume when it's inside it), then the volume will not render properly.
This commit resolves most of these issues by making the camera
bounding box larger than before, taking into consideration
features like:
1. The impact DOF could have on the camera ray start position and how
that should impact the bounding box size.
2. Taking into consideration near clipping, which was missed from the
orthographic camera due to a oversight in a previous commit
(08cc73a9bb).
Pull Request: https://projects.blender.org/blender/blender/pulls/123341
The callables generated by OSL reference other external functions
(defined in the OSL services module), in which case OptiX cannot
calculate the right stack size just based on the callable alone, it needs to
know all functions linked together in the pipeline to get to an accurate
result. `optixProgramGroupGetStackSize` has an optional pipeline
argument for this purpose, so make use of that to ensure the correct
stack size is calculated.
Ref #122779
Pull Request: https://projects.blender.org/blender/blender/pulls/123368
This makes it more verbose, and a little clearer that devices prior to 8cx Gen3 are not supported in >=v4.0. It makes the error message from #113674 more prominent than just being printed to cout.
Spurred by an email I got from someone trying to run blender on a Surface Pro X, and getting the not very helpful (to old devices) error.
Pull Request: https://projects.blender.org/blender/blender/pulls/122732
The base-4 Owen scrambling hash needs a seed value that's somewhat random-
looking, so the default value of 0 causes problems. Hashing the input seed
avoids this.
To avoid changing the noise pattern in pre-4.2 scenes, this hash is only
applied to blue-noise patterns.
Pull Request: https://projects.blender.org/blender/blender/pulls/123274
This PR hooks up the vulkan backend with the render graph
for drawing. It can run Blender better than the previous
implementation so we also flipped it to be the default
implementation.
**Some highlights**
- Adds support for framebuffer load/store operations
- Adds support for framebuffer subpass transitions
- Fixes workbench shadows
- Performance is just below OpenGL performance when comparing
fps. But the screen feels more fluent when using complex
scenes.
- Current performance is without doing any optimizations so
will improve in the future.
- EEVEE will not crash but has artifacts and many parts that
require more work.
**Related to**
- #121648
- #118330
**Known Limitation**
- Similar to previous implementation resources can be freed when
still in use crashing Blender. This is typically the case when
playing back an animation or updating a material icon.
**Next steps**
- Remove old implementation
- Get EEVEE to work
- Fix double resource freeing
- Improve performance by identifying hotspots and change them
Pull Request: https://projects.blender.org/blender/blender/pulls/121787
`num_distribution` in `KernelIntegrator` has type `int`, which holds a
maximal value of 2147483647. However, when computing the distribution,
`size_t` is used, which can go beyond this value and result in a
negative value when converted to `int`.
This PR handles this case as an error, stops rendering and suggests
alternative solutions.
Also early return when `use_light_tree`. The block was there because
`num_distribution` was needed for light tree before bfd1836861.
Pull Request: https://projects.blender.org/blender/blender/pulls/123177
Extract
- Cycles denoiser enum.
- Extensions user preferences UI.
- Node operator poll message from new node function.
Improve
- Split "(Enabled|Disabled) on startup, overriding the preference."
into two messages.
Disambiguate
- "Add" when describing the action of adding something should use the
Operator context.
- "Dimensions", in noise textures.
- "Transform" as a noun, the matrix transform type of Geometry Nodes,
as opposed to the verb to move things in space.
- "Parent" as a noun or verb (the parent of an object, to parent an
object to another).
Some issues reported by Satoshi Yamasaki, deathblood, and Gabriel Gazzán.
Pull Request: https://projects.blender.org/blender/blender/pulls/122969
* Always define root directories in LIBDIR even when not needed,
to silence some warnings.
* Only show warnings about not finding libs when oneAPI is enabled.
* Prefix message for context.
