Parametric Model Maker - how can my .SCAD file know?

Dear BBL developers,

My .scad file is designed to take advantage of your unique features (multiple plates, color output) when running on MakerWorld, but cannot use those features (well, multiple plates) when running on a user’s local OpenSCAD.

Is there a special variable like $version that can tell me that we’re running under your Parametric Model Maker instead of a local copy of OpenSCAD?

Thanks!

Use top-level code to create a display of your parts, and protect it with a if ($preview) ....

See this example.