# A3DRWParamsExportUSDData

struct `A3DRWParamsExportUSDData`

  A structure that specifies parameters used to write the model file to USD format.

  > 25.4

  > This structure is experimental and may change in future versions. For more information, see`Experimental <https://docs.techsoft3d.com/exchange/latest/extension.html>`__

  ## Index

  Variables

  - `m_bInstancing`
  - `m_bExportGlobalTransformations`
  - `m_bWriteHiddenObjects`
  - `m_bWriteWireframe`
  - `m_bWriteAttributes`
  - `m_bSewMesh`
  - `m_bWriteMaterials`
  - `m_eTessellationLevelOfDetail`

Variables

A3DBool `A3DRWParamsExportUSDData.``m_bInstancing`
  `A3DBool`

  Controls if the USD file should use instancing.

  True by default.

A3DBool `A3DRWParamsExportUSDData.``m_bExportGlobalTransformations`
  `A3DBool`

  When m_bInstancing is false, controls if the USD file should use global transforms, else local transforms are applied.

  False by default.

A3DBool `A3DRWParamsExportUSDData.``m_bWriteHiddenObjects`
  `A3DBool`

  Controls if all parts should be converted and visibility settings maintained.

  If false, hidden or non-visible parts are ignored. True by default.

A3DBool `A3DRWParamsExportUSDData.``m_bWriteWireframe`
  `A3DBool`

  Controls if the USD file should export wireframes.

  False by default.

A3DBool `A3DRWParamsExportUSDData.``m_bWriteAttributes`
  `A3DBool`

  Controls if the USD file should convert metadata, including PMI, to USD attributes.

  False by default

A3DBool `A3DRWParamsExportUSDData.``m_bSewMesh`
  `A3DBool`

  Controls if the USD file should deduplicate mesh vertices and normals (welds mesh).

  True by default.

A3DBool `A3DRWParamsExportUSDData.``m_bWriteMaterials`
  `A3DBool`

  Controls if the USD file should use materials.

  True by default.

A3DETessellationLevelOfDetail `A3DRWParamsExportUSDData.``m_eTessellationLevelOfDetail`
  `A3DETessellationLevelOfDetail`

  Controls the tessellation level of detail to recompute in case the tessellation is missing or invalid.

  kA3DUSDTessLODMedium by default. LOD from kA3DTessLODExtraLow to kA3DTessLODExtraHigh supported only.

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