Hello there!
I've recently made a wallpaper entity, that acts somewhat like an item frame or a painting. However, the resulting light rendering is far from perfect. As it can be seen here https://drive.google.com/file/d/1fPQ0byq-3cJAE9LPGvRhe2-Lg3uAL6qy/view?usp=sharing wallpaper tiles (wallpaper has width and height of the block) are lit independently by torches at night or indoors.
Rendering class was adopted from painting renderer (PaintingRenderer in official mappings). The source code for it can be viewed here: https://github.com/ArthurLlew/BetaDeco/blob/forge-1.20.1/src/main/java/net/arthurllew/betadeco/client/render/KaevatorWallpaperRenderer.java
Is there a way to smooth light from torch-like sources on such entities?