R8 Arctic transparency bug?

[ShynnSup]

Hi, you might have better luck using a material with transparency and rendered mode.

Or change those object display mode to shaded or ghosted or some other custom display mode with command SetObjectDisplayMode.

As described here arctic and transparency are not exactly supported.

Control amount of Transparecy of Material in Arctic Mode?

Okay, let’s go through what’s actually happening here, and why. The main problem here is that Rhino does not support making shadows lighter if they are caused by transparent objects. So ideally, if we have a solid object, the shadow that is cast due to the object should be at “full strength”, a shadow cast due to a 50% transparent object should be at “half strength”, and a shadow cast due to a 100% transparent object should not be visible at all. Rhino only supports casting a full strength sha…