Hi,
Have you got a similar problem as described in detail by Docteur_Fernandez: have you imported personal sbsar in your shelf? If so, the answer might lie in graph optimization.
Otherwise, could you share your log and describe your own situation in detail?
For now, I can only recommend that you check our guidelines on performance:
https://docs.substance3d.com/spdoc/performances-guidelines-168198992.htmlKind Regards,
Geoffroy SC