• Character related: Real-time mode does not support DH and SSS shaders causing strange white lines to appear on the material.
• Tips for semi-transparent materials (RTX Real-time mode only)
  
• Handling Metallic Materials
  
• Miscellaneous
  

Materials and texture files will also export with the character. Different MDLs will be given depending on the Export USD (Omniverse) > Material > Render Modesettings.


RTX Real-Time: iClone Digital Human shaders and SSS materials will be downgraded to Omniverse PBR shader.
RTX Path-Traced: Digital Human shader Skin, Head, Tearline, Eye occlusion, and SSS will use the Omniverse SSS shader. Path-Traced mode preserves most adjustable parameters, with an overall visual improvement at the expense of additional system resources.

iClone, CC Export > Material > Render Modedefault to RTX Path-Traced because of its superior visual quality.
*You can set Omniverse to Realtime mode for faster operation after having imported from iClone in Path-Traced mode.

When a Digital Human character with SSS shader is exported in RTX Path-Traced mode into Omniverse and the render mode is changed to RTX Real-time within Omniverse, then the SSS shader will not take effect and the Digital Human's material will change to pure white or pure black without any of the original material details. Simply switch back to Path-Traced mode to restore the Digital Human shader quality:

White lines can appear whenShader >Subsurface Scatter Scaleis set too high, or when an improper SSS map is used, such as a solid white texture.
Strange white lines appear on the character exported from iClone (Embedded > 4.ExPlus Facial Demo.iProject) to Omniverse


Reset the SSS map in iClone and reduce the Subsurface Scatter Scale value to remove the white lines


The character after the aforementioned adjustments

Even though Omniverse RTX Real-time mode currently supports semi-transparency, its level of support is not as complete as RTX Path-Traced mode, and can lead to issues with transparency sorting.
Enable Opacity Cutoutwill be enabled for USD files imported to Omniverse from iClone (usingExport USD (Omniverse) > Material > Render Mode > RTX Real-Timeexport). This means that semi-transparency will be disabled and the cutoff for the transparency will be decided by theOpacity Threshold.


Note: You can skip the following section if you don't experience the following problem (with Render Mode is set to Path-Traced).

*Any greyscale value that is neither pure white or pure black is considered semi-transparent.


If Export > Render Mode > RTX Real-Time was used to export to Omniverse, than any greyscale value below 20% will be considered see-through when theOpacity Thresholdis set to 0.2. You can disable Opacity Cutout to restore the semi-transparent effects

Taking embedded character Katherine's hair as an example, we'll export her to Omniverse and disableOpacity Cutout for the hair.


Using the example of a window exported to Omniverse from an embedded project in iClone (GI Loft Scene):
*Besides disabling Opacity Cutout, one can also adjust theOpacity Threshold, shown below

This problem has a tendency to only manifest in RTX Real-time mode. You'll need to increase the Ray Tracing > Reflection > Max Roughness value to expand the reflected areas on the surface materials.

Select the dome light in the scene and activate Dome Light > Visible In Primary Ray

The following image is produced in iClone: