Can I define my own depth sorting for the sprites when the perspective camera is used?

[Dragosha]

@Terranion

Drawing into a DepthBuffer…somehow first and then drawing again but based on the generated DepthBuffer? Not an option! The problem of depth testing for semi-transparent objects is not generally resolved, and I see why: if the object is half transparent then should it write the depth values into the depth buffer?

This is partly solved in the fragment shader by calling discard for transparent pixels. But this does not work well for opaque surfaces (like glass).

    vec4 color = texture2D(tex0, var_texcoord0.xy) * tint_pm;
    if(color.a < 0.3) discard;