Does anyone know why my model model is shifting at render? see attached:
Vray plane can cause this.. If you are using hdr image, ground level may looks like this..
Hi @myfraz95
Would it be alright if you share the project with us so we can investigate in detail? If this is fine, please send us an archived copy (Extensions > V-Ray > Pack Project) via email or a file-sharing service of your choice to support@chaosgroup.com (please reference this forum thread as well).

