im currently working on an iso game and i'd like to use the zbuffer in order to help with 3d sorting, only problem is that i can only do this by playing with an objects Z elevation, which will also have scaling effects on the object due to the perspective transformations the 3d zelevation in construct causes. i know its late for a feature request, but i would really appreciate it if someone who can play around with the source could create an option to turn off scaling effects, so that zelevation wont distort images/graphics etc, only change their level in the zbuffer for sorting purposes.
i've tried using small z values and playing with everything but its ultimately futile, i can't really fight the projection perfectly, and its not the most elegant of solutions.