More curtain models:
https://3dsky.org/collection/shared/5249944 
https://3dsky.org/collection/shared/5452447 

Decorative curtain from volumetric circles
Can also be used for zoning the space
The color gradient is easily adjustable in the Gradient Ramp map

3dsmax 2013 file and FBX with Corona materials
All materials are CoronaLegacyMtl, compatible with older versions of Corona