Maybe you`ve changed the surface geometry or camera angle a bit :-).I don`t believe this is fixable with some v-ray settings in max. This bug appears when the reflected texture becomes overstretched over the surface, more then 1:1. you will never see it on sphere if you test it.
Not sure humh, I think I either changed from VrayHDRI to Bitmap, or from 8 atmosphere map to Vray Light Dome… Cant remember which one and if it even is this…
you may also solve this issue by making the dome light invisible to reflection/specular and put your hdr into the reflection override of the render globals.
Has this been fixed? Is there a known issue here? I have exaclty this problem and I would really appreciate a fix…
resolution spinner in the light maxes out at 2048…