I have a 15x15x15 Part with a Texture Instance using a checkerboard decal on all sides.
Each Texture’s U & V scale is 15 & 15 respectively.
These lines appear at the end of the texture, which are not desirable.
I don’t think it’s just the image itself, since i tried a couple other checkerboard decals and experienced the same problem.
Using a custom material won’t yield this issue. Otherwise, I’m unsure of how to fix this. Maybe you should report it as an engine bug so it can be reviewed.
That seemed like it could work. However, as far as I can see from checker materials that have been made, some of the sides don’t line up, which is much less ideal in its own part despite the materials somewhat fixing the line edge issue.
I’ll wait a little bit to see if there are any other solutions before trying to report it as a bug.
Perhaps scale the u and v down by just a little?
You could also try to color your stuff a different way to see if the issue persists.
Textures (can be tilled)
Surface appearance
Material Variant.