Pushed to face/OVP
60c88ea TileManager2: Elevation support added for resolution level 4 (2x1 patches).
8049726 TileManager2: now supports elevation data down to resolution level 5
a0956b1 Bug fix: mesh-based planet surface were not rendered.
6d4e109 Bug fix: Old-style planet surfaces (TileManager) were rendered too dark because normalisation of normals was not enforced after rescaling world matrix