Render As Subdivision –When enabled, the object is subdivided during rendering.
Preserve Geometry Borders – When enabled, edges on the geometry borders are not subdivided.
Preserve Map Borders – Specifies how to handle subdivisions of UV coordinates at UV seams. The possible values are:
None – UVs are always subdivided regardless of whether they are on a UV seam or not; Internal – Only preserves UVs if they are on an internal UV seam; All – Does not subdivide UVs on UV seams.
Classic Catmull-Clark– When enabled, V-Ray uses the Classic Catmull-Clark method for subdividing the mesh instead of the hybrid one used by default. This option should be enabled only if the mesh is composed entirely of rectangular faces or it does not work.
