If a project is opened using an older V-Ray version than the one it was created with, a prompt message will offer wiping all V-Ray data to ensure file stability. V-Ray for SketchUp is not forward-compatible, meaning projects done with V-Ray 6 are not guaranteed to work with V-Ray Next or older versions. However, for compatibility reasons, some features and workflows have been adjusted and are discussed in detail below. V-Ray 6 adds a number of rendering optimization features. This page provides information on how the latest version of V-Ray handles scenes saved with previous versions of V-Ray.
