Crookes Radiometer

[jimhami42]

@Thorleyian

Maybe SketchUp hasn’t took into account the transparency applied and only sees the outer sphere as a light “blocker”?

It’s rendered with KerkyThea outside of SketchUp, so it’s not a SketchUp thing.

@Thorleyian

whether a shadow like that would cast from a transparent material

I think it depends on the material and the shape … here’s a thread where I created some lenses using various smoothing versus no smoothing:

Indentations problem in curved surface when tapering

I downloaded a trial version of Thea and used it to render different models I have. I really like it a lot I’ve decided that there is magic in SketchUp surfaces created with arcs. I used the following circle and semi-circle to generate four different spheres: [image] All four spheres were created with the Follow Me tool; the first used the native arcs; the second used an exploded path; the third used an exploded template; and the fourth used both an exploded path and exploded templat…

Generally (Kerky)Thea does a very good job tracing the actual paths the light should follow.