Merge pull request #1024 from ZappoMan/voxel_render_modes

Voxel Rendering Improvements - make it run at 60fps
Fixes for eyes rolling back in head, macaw head without mapping file.
Merge pull request #1027 from ey6es/master

Fixes for eyes rolling back in head, macaw head without mapping file.
Merge pull request #1025 from ZappoMan/voxel_render_modes

two possible crash fixes