This new plug-in allows to periodically multiply geometry without additional memory consumption.
As a sample you can use any tiled geometry (or those with unobtrusive joints)
VRayPattern allows curving geometry of any surface.
The plug-in works in similar way as displacement map. However, displacement map can only use raster or vector maps of pattern to cover the surface of geometry, VRayPattern can use any of the original geometry for propagation.