Update
Performance optimization for Cython renderer
Fix Python image data representation
Fix Cython image data representation
Add gui.py
Add shading mode to GUI
Update z buffer calc
Faster z buffering
Update Cython renderer
Fixup
Fix Cython draw_polygons
Update vrml and draw_polygons
Performance tuning
Fixup
Performance tuning
Update tasks
Update GUI
Add sample file downloader
Update
Update