Gasoline blob puddles won't draw?

[hogsy]

ShouldDraw always returns false? Even though the entity has the correct flag to indicate it has stopped and the fade is still at its peak. Very strange, I'm obviously reading something wrong here.

If you force it to draw the puddle, the puddle's alpha level will always return null. Again, puzzling behaviour but once again I'm obviously reading something wrong.

I've added a material to replace the missing decal at least.