For using textures in WADs I know that the best plan is to use levels of two, i.e. 256x256, 512x512, etc. Some say that you can't mix and match: i.e., 64X256, but I have had no problems with textures of this kind.

But what about "almost" power of two textures. This would be a texture sized 512X384. This does not look like a power of two, but 384 is 256 + 128, or "almost" a power of two. Has anyone experimented with texture sizes like this? Is is a recommended practice?
Thanks for your advice.