Cycles: merge of cycles-x branch, a major update to the renderer

This includes much improved GPU rendering performance, viewport interactivity,
new shadow catcher, revamped sampling settings, subsurface scattering anisotropy,
new GPU volume sampling, improved PMJ sampling pattern, and more.

Some features have also been removed or changed, breaking backwards compatibility.
Including the removal of the OpenCL backend, for which alternatives are under
development.

Release notes and code docs:
https://wiki.blender.org/wiki/Reference/Release_Notes/3.0/Cycles
https://wiki.blender.org/wiki/Source/Render/Cycles

Credits:
* Sergey Sharybin
* Brecht Van Lommel
* Patrick Mours (OptiX backend)
* Christophe Hery (subsurface scattering anisotropy)
* William Leeson (PMJ sampling pattern)
* Alaska (various fixes and tweaks)
* Thomas Dinges (various fixes)

For the full commit history, see the cycles-x branch. This squashes together
all the changes since intermediate changes would often fail building or tests.

Ref T87839, T87837, T87836
Fixes T90734, T89353, T80267, T80267, T77185, T69800

1 files changed, 30 insertions, 14 deletions

diff --git a/intern/cycles/blender/addon/version_update.py b/intern/cycles/blender/addon/version_update.py
index 827f84b9873..57da7d7995c 100644
--- a/intern/cycles/blender/addon/version_update.py
+++ b/intern/cycles/blender/addon/version_update.py
@@ -109,7 +109,7 @@ def do_versions(self):
         library_versions.setdefault(library.version, []).append(library)
 
     # Do versioning per library, since they might have different versions.
-    max_need_versioning = (2, 93, 7)
+    max_need_versioning = (3, 0, 25)
     for version, libraries in library_versions.items():
         if version > max_need_versioning:
             continue
@@ -166,10 +166,6 @@ def do_versions(self):
                 if not cscene.is_property_set("filter_type"):
                     cscene.pixel_filter_type = 'GAUSSIAN'
 
-                # Tile Order
-                if not cscene.is_property_set("tile_order"):
-                    cscene.tile_order = 'CENTER'
-
             if version <= (2, 76, 10):
                 cscene = scene.cycles
                 if cscene.is_property_set("filter_type"):
@@ -186,10 +182,6 @@ def do_versions(self):
             if version <= (2, 79, 0):
                 cscene = scene.cycles
                 # Default changes
-                if not cscene.is_property_set("aa_samples"):
-                    cscene.aa_samples = 4
-                if not cscene.is_property_set("preview_aa_samples"):
-                    cscene.preview_aa_samples = 4
                 if not cscene.is_property_set("blur_glossy"):
                     cscene.blur_glossy = 0.0
                 if not cscene.is_property_set("sample_clamp_indirect"):
@@ -203,7 +195,6 @@ def do_versions(self):
                     view_layer.use_pass_cryptomatte_material = cview_layer.get("use_pass_crypto_material", False)
                     view_layer.use_pass_cryptomatte_asset = cview_layer.get("use_pass_crypto_asset", False)
                     view_layer.pass_cryptomatte_depth = cview_layer.get("pass_crypto_depth", 6)
-                    view_layer.use_pass_cryptomatte_accurate = cview_layer.get("pass_crypto_accurate", True)
 
             if version <= (2, 93, 7):
                 if scene.render.engine == 'CYCLES':
@@ -229,6 +220,35 @@ def do_versions(self):
                     cscene.ao_bounces = 1
                     cscene.ao_bounces_render = 1
 
+            if version <= (3, 0, 25):
+                cscene = scene.cycles
+
+                # Default changes.
+                if not cscene.is_property_set("samples"):
+                    cscene.samples = 128
+                if not cscene.is_property_set("preview_samples"):
+                    cscene.preview_samples = 32
+                if not cscene.is_property_set("use_adaptive_sampling"):
+                    cscene.use_adaptive_sampling = False
+                    cscene.use_preview_adaptive_sampling = False
+                if not cscene.is_property_set("use_denoising"):
+                    cscene.use_denoising = False
+                if not cscene.is_property_set("use_preview_denoising"):
+                    cscene.use_preview_denoising = False
+                if not cscene.is_property_set("sampling_pattern"):
+                    cscene.sampling_pattern = 'PROGRESSIVE_MUTI_JITTER'
+
+                # Removal of square samples.
+                cscene = scene.cycles
+                use_square_samples = cscene.get("use_square_samples", False)
+
+                if use_square_samples:
+                    cscene.samples *= cscene.samples
+                    cscene.preview_samples *= cscene.preview_samples
+                    for layer in scene.view_layers:
+                        layer.samples *= layer.samples
+                    cscene["use_square_samples"] = False
+
         # Lamps
         for light in bpy.data.lights:
             if light.library not in libraries:
@@ -249,10 +269,6 @@ def do_versions(self):
             if version <= (2, 76, 9):
                 cworld = world.cycles
 
-                # World MIS Samples
-                if not cworld.is_property_set("samples"):
-                    cworld.samples = 4
-
                 # World MIS Resolution
                 if not cworld.is_property_set("sample_map_resolution"):
                     cworld.sample_map_resolution = 256