A list of some common mistakes when mapping in Hammer, how to fix them, and why they're bad!

I know this is a bit of an unusual video to show up on this channel, but after STILL seeing these mistakes being made in people's maps, I felt compelled to make this, as I haven't seen a similar video out there.

Timestamps:

Intro 0:00
Scale 0:17
Skybox 1:12
func_detail 05:54
Grid size 08:44
Displacements 10:17
Summary + Final Words 12:15