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to describe my question in the title even more, let's say I have a corrugated metal texture, whether displaced or not, at the bottom of the texture, I want to add darkness so the viewer nor the player can see what's below, just like having to remove a screw there will be a dark spot that will not let you see what's inside Or if I have a gun barrel, I don't want the inside of my gun visible, I just want pitch black hole

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  • $\begingroup$ Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. $\endgroup$
    – Community Bot
    Feb 22 at 19:04
  • $\begingroup$ You're going to have to describe to us what the 'bottom' is, geometrically, if you don't just want to fade an image to black in the appropriate dimension and use that as a UV texture? $\endgroup$
    – Robin Betts
    Feb 23 at 16:33

1 Answer 1

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Quick/Easy:

A trick I use a lot of the time is just to assign NO SHADER (no light response) to these areas.

enter image description here

Ideally, your scene composition and lighting should provide you with the effect you want with minimal changes. In your gun barrel example, the gun is lit from the outside so you should have very little light inside the barrel. There will be some, though, due to bounced lighting, so you can compensate for that by adjusting the exposure either in the compositor or in the Color Management pane in Render Settings.

enter image description here

In this very simple example I just brought the low tones down closer to 0.

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  • $\begingroup$ thank you so much $\endgroup$
    – Layth Gold
    Feb 24 at 16:58

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