So I had this question for a while now, very curious to finally get it straight.
The glass lighting. When you put it like that:

The side of the brush is inside the light and is flickering. How do I avoid it?
I thought about resizing this side of the brush, but it only lets me set it to 1 inch, not less.

Texture it with nodraw to make that bit invisible. (behind these lights you should have nodraw anyway).
I like doing using the vertex edit tool / clip tool to make a 45? bevel so it isn't sticking out, and doing similar with walls and corners to make them neater.

TeamSpen210 wrote:
Texture it with nodraw to make that bit invisible. (behind these lights you should have nodraw anyway).
I like doing using the vertex edit tool / clip tool to make a 45? bevel so it isn't sticking out, and doing similar with walls and corners to make them neater.

I should have thought of that sooner xD Thanks a lot!