Hello,
We have yet to post V4 documentation up, however, here is the updated signature for the OxAlembicExport function:
OxAlembicExport [string filePath] [bool exportSelectedHairs] [int startFrame] [int endFrame] [bool exportRenderVersion] [int upDirection]
exportRenderVersion
: If true render count and settings for hair will be exported. Otherwise hair will be exported as it is seen in the viewport. upDirection
: Specifies the "up" direction of the exported hair scene. Accepted values are 0: X-axis, 1: Y-axis, 2: Z-axis. For example, exporting hair to Maya requires Y to be the "up coordinate".
Marsel Khadiyev (Software Developer, EPHERE Inc.)