Skip objects not visible in current scene
Convert objects to meshes
Add support for directional lights
Set default samples_per_pixel to 1
Send stack trace in error message to blender
Send done message in ConnectionHandler
Use samples_per_pixel when building PixelShader
Pass loop normals
Remove unnecessary casts
Add serialization version ID
Formatting change
Return default values when reader not provided
Remove trailing whitespace
Add 3D point in triangle test, barycentric coords
Remove unnecessary casts
Work on MeshGeometry intersection
Merge branch 'develop' into proto