FIXED: Camera Plane SOP, OBJ

The default shader fixed. Textures are displayed in the viewport
correctly and it uses Tint's fourth value as an opacity multiplier. Now
the shader works almost identically in all major shading engines (OGL,
MP, RT, PBR).
Merge pull request #123 from gadfly16/dev

FIXED: Camera Plane SOP, OBJ
Merge branch 'dev_jq' into dev
H13: Scatter qL SOP
H13: Vector Store qL SOP
H13: Ray qL SOP
Merged work: H13 updates--Ray, Scatter, Vector Store