Comparison with Iray Photoreal

Following is a list of key differences with Iray Photoreal:

• Physically based but not unbiased.

• Currently, no support for:

  • Volumetric effects.

  • Rounded corners.

  • Non-specular refraction. Frosted glass appears black.

  • Motion blur.

  • Custom matte objects.

  • Full light path expressions.

• Support for physically inplausible flags:

  • Objects: shadow_cast, shadow_recv

    Note: Shadows are missing if not enabled in the scene.

  • Lights: shadow_cast

• 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.