FOSS gamedev and creative worlds

There is a shadow bug with sand in water:
[img=Shadow Bug1]http://sfan.bplaced.net/upload/screenshot_70798178.png[/img]
After placing or mining a block:
[img=Shadow Bug2]http://sfan.bplaced.net/upload/screenshot_70803766.png[/img]

This happens elsewhere too; it happens due to the fact that the game doesn't update the mesh (geometry, which includes brightness values) always when the neighboring chunk of stuff is loaded.

This has been chosen partly because it isn't needed with non-smooth lighting (which was the only option until not so long ago) and partly because of performance. Might change some day, might not. But fixing it basically doubles chunk loading time due to doubled amount of chunks to generate geometry for.