The phrase is often a contradiction in CGI. Usually, "free" is low quality, and "best" is paid. However, interoperability allows you to get "best" assets for free via smart sourcing.
V-Ray 6 represents a significant leap for the SketchUp ecosystem, bringing features that were previously only available in standalone high-end renderers. Key Features of V-Ray 6 V-Ray Enmesh The phrase is often a contradiction in CGI
To keep your V-Ray 6.0003 project lightweight for transfer: "free" is low quality