I don't know any map editor (or any other software) in existence which would discard rendering context Not even Starcraft 2 map editor when there is only trigger/script editor window open. Exception is fullscreen resolution change.

At the meantime with nxPascal, work on Edit3D has continued. Solved the polygon picking and other matrix math for all cursor controls. Camera, objects and selected vertices can be moved and rotated. Selection with rectangle region, using gluProject(). Periodic fighting with small bugs etc... in editor code that is. It is very very rare occasion that i find bugs in nxPascal core. There are still 0 known ones.