Smoke&Spectre Fixes (Patreon)

Short: Smoke should be behaving properly now.
Long: While making improvements to the code, there were some things setup incorrectly and were working.. I feel purely by luck.  When handled correctly, they kind of just broke - because the data wasn't flying in as fast as it expected.

So a round of general improvements, and no more ultra-black fog. (Which was Smoke rendering the fog 4 times and overlapping it.)