Comparison with Iray Photoreal
Following is a list of key differences with Iray Photoreal:
Physically based but not unbiased.
Currently, no support for:
Non-specular refraction. Frosted glass appears black.
Custom matte objects.
Full light path expressions.
Support for physically inplausible flags:
- Objects: shadow_cast, shadow_recvNote: Shadows are missing if not enabled in the scene.
Support for trace depth parameters: depth, depth_reflect, depth_refract, depth_shadow
Differences in behavior of directional lights and shadows when the environment dome is enabled.
- The opacity of decals can only be controlled by the cutout value, but not semi-transparent BSDFs. Furthermore, decals are not taken into account for shadows.