Oh maybe because you're using the old Displace modifier? Which renderer are you targeting in Max? If you're using V-Ray, it's better to use the VRayDisplacementMod modifier.
Sorry to resurrect an old thread, but I don't suppose you still have these tutorials, @EarthQuake? They don't appear to be on the Marmoset website any more? And I can't find them via a Google search. Thanks.
Looks neat! I think the roof needs some more work. Right now it's just 100% rust. Could go with rust decals instead, or vertex painting? The STAIION signs look a bit low res The 66 sign looks low res too. The plants under the roadside STATTION sign look kinda old school. Give the grass a bit of a curve, and have it coming…
feed back check out the old rock thread: https://polycount.com/discussion/125857/rawk-post-any-rocks-you-make-here/p22 https://www.youtube.com/watch?v=Z7m_4eDicJI https://www.youtube.com/watch?v=lam2GWZ6KTM
Oh, I'm still on a very old version (4.9) It looks like the 'conform retopo mesh' option is available on the sculpting tools now too: https://www.youtube.com/watch?v=kbWlDtBGiGA