Displacements have texture issue beside brush of same texture

[goem]

Here's what I mean:

It adds these weird shadow things to the edge of the displacement that makes it look wonky with regular brushes, and I dunno why. Help?

 

[henke37]

I suspect that you converted all six faces of the brush to displacements. Don't do that.

 

[Da Spud Lord]

Alternatively, are you compiling VRAD on fast mode? Although useful for testing, one of the side effects of fast VRAD are these shadows along displacement seams.