Known Issues#
Insufficient Tessellation Quality on Native Revit Pipe Catalog Elements
When converting Revit models containing pipe catalog elements (pipes, elbows, couplings, tees, etc.), curved surfaces may appear faceted rather than smooth due to insufficient tessellation resolution.
This results in visual artifacts and faceted shading on cylindrical and curved pipe components in the converted USD output.
Workaround: Scene Optimizer Utilities
To improve the visual quality of affected pipe elements:
Disable the “instanceable” flag on meshes that require the workaround.
Run Scene Optimizer Mesh Cleanup with all settings enabled.
Run Scene Optimizer Generate Normals with default settings.
Note: The instanceable flag must be disabled before applying Scene Optimizer operations for the changes to take effect.
Creo Simplified Representation May Exclude Child Parts When Parent Assembly Is Excluded
When converting Creo (Pro/E) files using the View Layer Name option to extract a simplified representation, child parts may be incorrectly excluded from the converted USD output even when they are specified to load as a different representation.
This is a limitation in the HOOPS Exchange SDK. Support for Creo Simplified Representations was introduced in HOOPS Exchange 2026.1.0 and improvements are being worked on by TechSoft.
Default Simplified Representation in Creo
Custom Simplified Representation in Creo
Default Simplified Representation Converted in HOOPS Demo Viewer 2026.1.1
Custom Simplified Representation Converted in HOOPS Demo Viewer 2026.1.1
