The lighting plug-in "todo"-list:
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* Supersampling/antialiasing
* Bilinear filtering of environment map
* Refraction back in?
* Support for any-sized non-gray bump-maps.
* Support for gray or alpha-channeled env-maps.
* Zooming and scrolling in preview window
* Autoconf/automake stuff
* Put spotlight back in
* Nicer interactive UI
* Presets
* Multiple light sources