artefacts in ID map

[Mesk911]

Hello!
I'm trying to import my model from Blender, but suddenly ID map is baking with some bugs (screenshot in attachment).
How can I fix it?
Thank you in advance!

[GeoffroyAdobe]

Hi,
could you tell us a bit more about your problem :
 - what are your baking settings?
 - what are you're low poly and high poly looking like?
Tweaking the Max frontal distance and your Max rear distance might provide the solution to your problem.
Or, it might be a bug, in that case, could you share your log?
Regards,
Geoffroy SC