It shouldnt be too much work. All you need to draw is the countour of the window (on a layer), then invert and tone down the original texture image. In this one i add contrast in the inverted image to make reflection texture in the concrete more apparent. Also for the frosty window i just made it more gray than for the clear window (which are black in the roughness texture). Dont think you need normal maps for these one. Again here, to have this effect, roughness have to be set around 0.9
Hi M7!
Yay! What you did there looks much better. I already made some textures with the windows black and the rest totally white, but about adding tone and contrast to the inverted image, i was far away
and yes, I probably don't need normal maps there. Thanks for the tips M7, because I'm not an expert and much less on creating textures