Get an approximate result like the Grime game in part of its scenes

Hey, so i’m trying to get the same look in my UE5 project as the game Grime, where one part of the scene seems to be pitch black and not affected by light. Does anyone know what would be the best way to aproach this look?

Some google links of images that show the effect i’m reffering to:

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First play with postprocess volume (drop it in level and make “Unbound”) some blurr etc could get you close.

Then you can try camera postprocess material.

And best results would be with camera postproceess shader (ie. made in HLSL).
To see what HLSL can do look for inspiration on:

Hey thanks for the reply! I played a little with custom stencils and the post process volume . Is there a way to only apply the custom stencil to one face of the cube? Similar to the cube in the left (the cube from the left has a material not a custom stencil, the right cube does have the custom stencil)
CubeWithCustomStencil

If game is sidescroller (ie. all polygons you want to make fun with face roughtly same direction)

you can use dot product between face normal and that direction to affect only ones facing camera.

Shaders are more art than coding. so hard to tell what would work.