I was dismayed to learn in the document that @Lynsey [Midoki] sent around that so I guess I have to attempt to solve it for you guys... Firstly, the problem does not apply to only Level 9+ Gun Towers. Level 7+ Gun Towers (when they gain the third gun) is when the bug is most noticeable but actually it affects even Level 1 Gun Towers. The problem is because the game draws overlapping equal translucent circles for each gun in the Gun Tower. Stacked alpha layers become less and less transparent. Spoiler One single circle: Two overlapping circles: Three overlapping circles: Spoiler A ship actually shows this effect all by itself because it has three guns that overlap at an offset. You can see zones that are single layer (where the red is lightest), zones that are double layer (a bit darker) and zones that are triple layer (darkest): The solution is actually pretty easy. Make the Gun Towers only render one of it's gun's range circles.
I really didn't even think twice about the transparency difference until you pointed it out. Now I understand better what your saying. Your solution does seem simple enough. TiGeR
