Most, if not all, mappers can agree that carving is bad and that it’s the worst tool in Hammer. If a brush is carved and stretched, some of the sides will go off-grid, making microleaks. However, after some testing, I’ve found that carving is in fact okay, IF the situation meets 2 standards.
There cannot be any kind of clips/brushes that aren’t cubes. All brushes have to be square/cubic/rectangular.
You MUST UNGROUP the carved brush, otherwise you’ll get the offgrid sides when you stretch/resize it.
If it’s hard to tell, those numbers are 64, 256 and 512, all 2^.
You’re probably saying, “But Pyth, why go through that trouble when I can just make 4 brushes?”. You can, of course, I’m just showing that carving isn’t as bad as everyone says.
tl;dr: Carving is alright if used right.
edit: 2017 holy shit i can still edit this