OSL Support Status

Supported

• Standard diffuse, oren_nayar and translucent closures
• appleseed-specific Ashikhmin-Shirley, Glossy, Glass, Metal, Subsurface and Disney's principled BRDF closures
• Emission and surfacearea()
• Background (for procedural environments end environment lighting)
• Transparency
• Texture lookups
• Bump mapping
• Object coordinate systems
• Camera coordinate system
• get_attribute and trace calls
• dtime and dPdtime globals

Missing

• NDC and screen coordinate transforms (work in progress)
• holdout and debug closures are ignored

Not yet supported by appleseed

• Geometry user data
• Displacement
• Arbitrary AOVs from shadergroups

Would be nice to have

• Light attenuation shaders
• Named coordinate systems?

Should work but untested

• Point clouds (using partio)
• Texture3d (using Field3D)