Cuttable ground fog

i am looking for a method to genrate ground fog and remove part of it if objects placed on the fog and replace it if the object removed. Exactly like in that game Drake hollow.

Here an example what i mean:

Has anyone an idea?

Thanks for your help.

Best regards Bastian

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thats probably done with a sphere mask. the fog is actually a mesh and it gets “cut” with a sphere mask. on top of that you have an actual sphere or cylinder around the player with the same radius as the sphere mask and an animated tiling texture with alphamap…

Thank you very much for your help. That’s what I’m looking for.