Blender Git Loki

EEVEE: Add back split sum BSDF approximation

This improves the surface appearance of most bsdf.

EEVEE: Material: Use weight to random sample closure per types

This adds a new closure selection method.

- In a first pass, weights are accumulated per output type (diffuse,
reflection, refraction).
- A random threshold is then generated before evaluating the BSDF nodes
again.
- During the evaluation pass the random threshold is decremented until
it reaches 0. At this moment the current BSDF is sampled.

For this to work, I splited the evaluation and the weighting in two
functions for all BSDF. The `*_eval` nodes are generated as dangling
nodes from the graph and only serialized after the rest of the graph.

Merging latest nv-usd-importer branch.

USD import: light unit conversion improvements.

Extended the logic to convert from nits to scale by the
light surface area. Also, added an option to scale the
radius of spot and local lights.

Add get_area_of_interest overloading and pass input_op

Merge branch 'master' into cmp-full-frame

LineArt: Use 2 way look up for global triangle index.

By Falk David

LineArt: Make consistent with master typo fix.

Fix T88464: Incorrect baking with camera markers.

Cleanup: Fix naming changes.

Merge remote-tracking branch 'origin/master' into temp-lineart-contained

Remove the string value from attribute socket.

Attribute sockets should come in varieties for basic data types (float,
vector, etc.) instead of a string. Existing attribute layers should be
accessed explicitly with a "Read Attribute" node (todo).

Typed attributes for basic data will do broadcasting eventually.
This will allow connecting singular value sockets to an attribute input
without the need for a "Fill" node and perform basic broadcasting.

Add a new socket type for attributes.

The default_value is a string, as it will basically behave like a string
socket with some additional management in geometry nodes.

When used as an output the attribute should be generated automatically.
Auto-generated attributes should be removed automatically as soon as all
using nodes are done reading them.

LineArt: BVH compiler switches.

LineArt: Use BVH for intersection calculation.

Merge remote-tracking branch 'origin/master' into temp-lineart-contained

Cleanup: remove redundant property for transfer_mode key-map item

As the property isn't saved and defaults to disabled,
there is no need to set it.

Cleanup: tweaks for Object Non-modal keymap

Simplify adding non-legacy keymap items.

GPUMaterial: Add recalc flag workaround

Recalc flag on Material ID being unavailable to render engine, this
adds a simple way to detect material update by detecting shader creation
or update.

GPUNodeTree: Add weight tree inversion

This constructs a "mirror" nodetree that feeds the closure "shader"
nodes with their respective final weight.

The tree is mirrored using simple math nodes. This is quite messy but
this is the only way to proceed without introducing special nodes.
The other issue with this method is that inputs are all uniforms even
for unplugged socket on temporary math nodes with add bloat to the
shader uniform buffer structure.

Only the part relevant to the weighting is duplicated. Other connexions
with the shading tree are reuse.

All shader nodes are updated to receive a `Weight` hidden parameter.

The original shader mixing tree is preserve to let the choice of using
either way to weight the output.

For now this is only done for the output nodes. This will need to be
extended to Closure to RGBA sub-tree.