Inconsistent tile usage

[johndh]

I think we need to establish conventions on how certain tiles are to be used, like which ones go in the background as decoration, which are foreground objects that you can stand on, etc., as well as which ones are harmful.

In some maps, the toxic waste tile (green one right next to the water) is used to denote pools of hazardous (i.e. instant death) stuff, whereas in other places it's harmless. Maybe we need a way to differentiate between the two so the player can tell whether or not it's safe to jump into it or not, so we don't have players getting to the sewer level and saying "WTF!? This stuff was harmless two levels ago!"

The tar pit tile is also used inconsistently. In the pits I made, the player needs to be fully submerged in order to die, but the new underground pits in the desert are instant death if Xeon touches them at all.

In general, I've been using the more painted-looking trees and such as backgrounds, and the bright pixelated ones as foreground objects, as that seems most fitting.

[p0ss]

i just added a mud tile to the tileset so that we can use it in places where the toxic sludge shouldn't be deadly and keep the sludge for deadly situations