Relates to MC-262692.
The bug
23w45a introduces the template model cube_all_inner_faces.json, used for hollow-looking blocks like spawners. It appears that powder snow has not been updated to use this model, meaning it instead continues to pointlessly define its own model, resulting in a much larger file size than is necessary.
How to fix
Make powder snow reference cube_all_inner_faces.json instead. An example of a fixed model file is attached.
Related issues
relates to
Attachments
Comments


If you use this fix the fog effect inside the powder snow blocks is applied to the incorrect faces.
Edit: Oh, well, the problem is MC-266463. With the culling problem corrected the fog effect works correctly with your fix.