Hello, Some news about this topic, it seems that the length of the folder where I save the c4d file have an incidence on whether the volumeloader work correctly or not ( C4d R23). if I save the file to E:\data\tests\export\USD, the volume loader does not work, If I save the same thing to E:\USD, it works. here are the files ( I renamed the files afterwards, tell me if you find a difference ) Untitled2_longfolder.c4d Untitled2_shortfolder.c4d Untitled2_Dense Stratus.vdb Untitled2_Cumulus.vdb the files' reference are relative so they should load fine. ( at least in a short folder)

right but when I load my document inside C4d ( R20 or R22), the clipping preset is medium and the clipping near and far are wrong ( back to medium)