A decal in UE4 always fades out the closer the face it is projected on is towards the X bounding scale of the decal. But there are no settings at all for it, when the X size is 500 it starts to fade out at something like 400. I can’t find settings for it anywhere, not in decal settings, not in blueprint and not in the material. Where can I find that setting?
Not exactly sure what you try to do but decal fade out can be disabled / changed when changing the Decal value Fade Screen Size (0,0 is never fade out). Explained here https://www.reddit.com/r/unrealengine/comments/neoh6b/comment/gyht2y6/?utm_source=reddit&utm_medium=web2x&context=3