Section viewports allow you to cut a section through an object, or several objects. After…
Vectorworks Tip 437 – Creating A Viewport That Fades Out
I saw on the tech board, somebody was asking for a technique that would allow the viewport to fade out. I think you can achieve this now if you put an object in your viewport with a transparent gradient. In the image you can see I created a gradient that changes from solid white to transparent. I used the attribute mapping tool to control where the transparent and solid parts are, and I also used the attributes palette to change the gradient from a linear gradient to a radial gradient.