Supported Shaders (Mental Ray)
Introduction
Some Autodesk shaders map directly to Mental Ray shaders. Here is a list of those shaders that are indirectly supported.
Mental Ray Shaders
Texture
mia_light_surface
The following parameters are not supported:
- use_lights
- lights_multiplier
- lights_eval
- Lights
Internally this is mapped to the Redshift Incandescent Material shader.
mia_amb_occlusion
The following parameters are not supported:
- falloff
- id_inclexcl
- id_nonself
mib_color_alpha
mib_color_average
mib_color_intensity
mib_color_mix
mib_twosided
Material
mia_material / mia_material_x / mia_material_x_passes
The following parameters are not supported:
- anisotropy_channel
- ao_do_details
- backface_cull
- bump
- fg_quality
- fg_quality_w
- indirect_multiplier
- intr_grid_density
- intr_refl_ddis
- intr_refl_ddist_on
- intr_refl_samples
- intr_refr_samples
- lights
- mode
- no_diffuse_bump
- no_visible_area_hl
- ref_falloff_dist
- ref_falloff_on
- refl_falloff_color
- refl_falloff_color_on
- refl_interpolate
- refr_interpolate
- single_env_sample
See Softimage Architectural shader for other details.
The multi-out feature of these shaders is not supported by Redshift.
mi_metallic_paint
The following parameters are not supported:
- flake_bump
- Irradiance_weight
- lights
- mode
See Softimage CarPaint for other details.
mip_cameramap
The following parameters are not supported:
- multiplier
- digamma (in Softimage – see notes)
In Softimage, 'multiplier' and 'degamma' are ignored because Redshift uses the 'Exposure' and 'Color Profile' options of the texture clip to achieve the same result.In Maya, 'multiplier' is ignored. Use the Redshift Camera Map shader instead.
mip_matteshadow
The following parameters are not supported:
- no_self_shadow
- catch_indirect (see notes)
- multiple_outputs
- illuminators list (see notes)
'catch_indirect' is implicitly enabled when 'catch_illuminators' is checked, this is because internally direct lighting and indirect lighting both use the 'Indirect' color to tint diffuse lighting results.To enable 'illuminator' lights to catch CG lighting on the matte surface, check the 'Matte Shadow Illuminator' option of the Redshift Physical Light and Redshift IES Lights.
Environment
mia_physicalsky
The following parameters are not supported:
- background
- diffuse_horizontal_illuminance
- flags
- physically_scaled_sun
- use_background
- visibility_distance
Light
mia_portal_light
The following parameters are not supported:
- cutoff_threshold
- shadow_ray_extension
- use_custom_environment
- visible
mia_photometric_light
The following parameters are not supported:
- cm2_factor (use Redshift Options -> Output -> Photometric Units instead)
- units_to_meter_scale (use Redshift Options -> Output -> Photometric Units instead)
mia_physical_sun
The following parameters are not supported:
- direct_normal_illuminance
- Illuminance_mode
mib_blackbody / mib_cie_d
Redshift's implementation of mib_blackbody and mib_cie_d use the same approximation algorithm. Meaningful temperature values are in the range 1667 to 25000.