Roger B rboxman
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  • Joined on 2017-10-09
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Roger B commented on issue blender/blender#108357 2023-05-29 10:53:26 +02:00
Cycles rendered 3DViewport massive performance drop, using lights with node groups. --Intel MacOS--

I simply did File->Append for your light and set up my own scene with it shining on a plane. On Windows a CPU render with the expensive light completed in 50 seconds. While a simple light using…

Roger B commented on issue blender/blender#108357 2023-05-29 10:17:49 +02:00
Cycles rendered 3DViewport massive performance drop, using lights with node groups. --Intel MacOS--

Nope, tested with 3.3.7 LTS and got the slowdown too. The file you provided isn't even operable on older versions (uses nodes that don't exist and crashes due to the mesh changes in 4.0).

What…

Roger B commented on issue blender/blender#108357 2023-05-29 04:58:02 +02:00
Cycles rendered 3DViewport massive performance drop, using lights with node groups. --Intel MacOS--

I'm not sure what you really expect here. That light is very expensive. It is made up of 12 4d voronoi textures, dozens of math operations, and various other expensive nodes.

Roger B commented on issue blender/blender#108061 2023-05-19 03:45:58 +02:00
(Fresh and 'unactivated') Windows 10 version turns Blender's default instructions for manually recovering startup and preferences files useless

That directory location is created on-demand. It will be created as-needed if you either save a new start-up file, save user preferences, or attempt to activate/install an addon. Until that…