How to make one part show over another part, both being the same size?

[rogeriodec_games]

When two parts of the same size are superimposed, currently Roblox gets confused and mixes both colors/textures:

Is there any way to prefer a color/texture of one part over another part (like a Z-Index) without having to change the size of one of the parts?

[bnxDJ (bnx)]

You could try applying decals with the color on top and change the decal ZIndex.

Why would you need to intersect the parts though?