Writing visible in renders

[mikegem776634]

I can see the words "drop a bitmap here" on my base color texture when applied to mesh.

[Gaetan Lassagne]

Hello,
It must be due to an image input that is empty (no image).
Based on the options you enabled in B2M, you have access to a "Main Input", "Relief" input, "Grunge", etc. Here it seems one is enabled but not used.
The solution is to check the image inputs you can see in the B2M properties and which one is empty.