The enumerator values for various GPU compute platforms were
added starting with OIDN 2.0, with the Metal GPU type added
in OIDN 2.2.
This is an alternative fix to ebb781675dd, which does not lead to
unhandled cases in switch statement, and follows the configuration
of OIDN and not Cycles (as OIDN might report devices which are
disabled in local Cycles build).
Pull Request: https://projects.blender.org/blender/blender/pulls/119155
Exact an exact match with Clang broke building when the compiler ID
was "AppleClang", reverting parts of [0].
[0]: 6549019ae19cecbea524782054dca0e99cb833b8
HIP fails to allocate textures, typically when they are too large.
This commit lets the user know what might be causing the issue
rather than providing a confusing internal error message.
Pull Request: https://projects.blender.org/blender/blender/pulls/118239
area light with zero spread was introduced in bf18032977. Such paths can
only be sampled with NEE, so MIS should not be used.
This fixes the discrepancy when Direct Light Sampling is set to MIS or NEE.
Pull Request: #118584
for a camera ray, compute the actual range of the hair width that the
current pixel covers, and only integrate that subset, to prevent a
ribbon-like appearance in close-up looks.
When the hair covers less than one pixel on the screen or when the ray
is not camera ray, the model works the same as before.
Pull Request: https://projects.blender.org/blender/blender/pulls/116094
The valid interval from incoming direction was shared between
`...eval_r()` and `...eval_residual()`, so compute that in `...eval()` instead.
The valid interval from outgoing direction was computed for
`...eval_r()` to further reduce the integration interval. This part is
removed because the check `dot(wo, wm) > 0` is relatively cheap inside the loop.
The geometry normal of the curve might not be precisely orthogonal to
the tangent due to interpolation. Previously, the tangent was adjusted
to be orthogonal to the normal. However, the normal is linearly
interpolated, which is less accurate than the tangent computed using Catmull-Rom.
This commit keeps the tangent and adjust the normal instead, besides
better accuracy, it ensures a smooth transition when the cross-section
shifts between circular and elliptical.
area light with zero spread was introduced in bf18032977. Such paths can
only be sampled with NEE, so MIS should not be used.
This fixes the discrepancy when Direct Light Sampling is set to MIS or NEE.
Pull Request: https://projects.blender.org/blender/blender/pulls/118584
if emission sampling is not set, we do not use MIS weight when sampling
from the BSDF, but we were still drawing samples from the light,
resulting in double contribution.
Pull Request: https://projects.blender.org/blender/blender/pulls/118534
The depsgraph CoW mechanism is a bit of a misnomer. It creates an
evaluated copy for data-blocks regardless of whether the copy will
actually be written to. The point is to have physical separation between
original and evaluated data. This is in contrast to the commonly used
performance improvement of keeping a user count and copying data
implicitly when it needs to be changed. In Blender code we call this
"implicit sharing" instead. Importantly, the dependency graph has no
idea about the _actual_ CoW behavior in Blender.
Renaming this functionality in the despgraph removes some of the
confusion that comes up when talking about this, and will hopefully
make the depsgraph less confusing to understand initially too. Wording
like "the evaluated copy" (as opposed to the original data-block) has
also become common anyway.
Pull Request: https://projects.blender.org/blender/blender/pulls/118338
These are now included in the OSL shared libraries, so no reason to
link against it.
The CMake code for WITH_LLVM remains in case it is useful in the future,
but is not enabled by any Blender feature now.
Pull Request: https://projects.blender.org/blender/blender/pulls/118229
Turns out we were not building OSL with OptiX enabled anymore.
Also check now if the OSL builds has OptiX support and if not
disable it in Cycles.
Building OSL with support for this (still) does not require
either the OptiX SDK or CUDA, it only needs LLVM.
Pull Request: https://projects.blender.org/blender/blender/pulls/118234
Currently the multi-input sockets are not exposed to the custom nodes
Python API. This makes some features cumbersome to implement if one
wants a node to process an arbitrary number of inputs.
One workaround is to make inputs duplicate themselves when a link is
created, but a proper multi-input would be easier to use for both
add-on developers and users.
This commit exposes a new `use_multi_input` boolean parameter when
creating a new node socket. This makes it possible to declare a
multi-input, while still leaving the existing `is_multi_input`
property read-only so that existing nodes cannot be made unstable.
The parameter is optional so existing scripts stay compatible. It also
raises an error when used on output sockets, since it makes no sense
for those to be multi-input.
The Custom Node Tree Python template was updated to reflect this
change by making one of the inputs of the custom node multi-input.
Pull Request: https://projects.blender.org/blender/blender/pulls/114474
