Lighten up a selection of solid

[martinsiegrist]

You can create your own transparency map.

The video linked in this post explanes how to viewcapturetofile:

Wish: precise png output with transparent backgrounds

At around 24 minutes of the video linked below, @BrianJ explains how to use a Floating Viewport to render a texture at an exact size: [Displacement Textures in Rhino 7] I did pretty much what he explained but to make things one step easier I centered your content on the origin. I had some trouble moving the corner of the camera to your curve control point I think because I had linked viewport turned on. It worked after I unchecked the option. Here’s the file I captured: [ViewCapt…