Cycles: Automatically detect HDRI resolution by default and use non-square sampling map

The automatic mode checks all Enviroment Texture nodes and picks the largest image's resolution.
If there are no Enviroment Textures, it just uses the old default.

Also, the sampling map now isn't limited to square shapes. The automatic detection uses the exact image size,
the manual UI option now halves the value to get the height.

A default aspect ratio of 2:1 makes sense since this is what most HDRIs use.

Reviewers: brecht, sergey

Differential Revision: https://developer.blender.org/D3477

1 files changed, 9 insertions, 4 deletions

diff --git a/intern/cycles/blender/addon/version_update.py b/intern/cycles/blender/addon/version_update.py
index 292f0a1fa90..dc28bc647b5 100644
--- a/intern/cycles/blender/addon/version_update.py
+++ b/intern/cycles/blender/addon/version_update.py
@@ -377,10 +377,6 @@ def do_versions(self):
         for world in bpy.data.worlds:
             cworld = world.cycles
 
-            # World MIS
-            if not cworld.is_property_set("sample_as_light"):
-                cworld.sample_as_light = False
-
             # World MIS Samples
             if not cworld.is_property_set("samples"):
                 cworld.samples = 4
@@ -431,3 +427,12 @@ def do_versions(self):
     if bpy.data.version <= (2, 79, 3):
         # Switch to squared roughness convention
         square_roughness_nodes_insert()
+
+    for world in bpy.data.worlds:
+        cworld = world.cycles
+        # World MIS
+        if not cworld.is_property_set("sampling_method"):
+            if cworld.get("sample_as_light", False):
+                cworld.sampling_method = 'MANUAL'
+            else:
+                cworld.sampling_method = 'NONE'