I'm not what I can call a "purist" (or else I would still be using Fractint and just tweaking the basic Mandelbrot/Julia set) but I tend not to use any kind of post-processing, even the unsharp mask and things like that. It gets a bit complicated when you think that a KPT's plugin for Photoshop is now "integrated" (so to speak) into UF, the "Flames". Is it a post-processing tool or a pure fractal formula? I'm confused.