More curtain models:
https://3dsky.org/collection/shared/5249944 

Linen curtain gathered on tape
Fabric color can be easily customized in Corona Color or Vray Color

3dsmax 2013 file and FBX with Vray materials
3dsmax 2013 file and FBX with Corona materials
Preview materials Corona
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Materials are compatible with older versions of Corona, all materials are CoronaLegacyMtl

For Vray versions below 3.1, some materials may not show up in MatEditor and when rendering. To fix this, set the Blinn value in the BRDF section.