Yep, but Cycles does not, that was my point. It’s a neat feature.
In Cycles, you can at least omit the interior edges of glass objects from visibility by use of the transparency shader and a simple trick with lightpaths and backface data.
The image they have for priority looks better than the simple overlap, but it still has a very noticeable line in the middle (I’m not sure if that is what you would want).
Looks ok to me - exactly as I would expect it to look. If you boolean two hard spheres together - the intersection is a sharp perfectly circular seam.
You get exactly the same sharp intersections with CPK renditions of molecules.
The only time you wouldn’t get a sharp seam is if you somehow smoothed the intersection (e.g. using phong shading or subdivision surfaces)
The volume on the right is absorbing a little light (notice how it’s slightly greenish and darker than the background). So of course it is also changing the color in front of the red sphere.
If you use a volume without absorption you won’t get any visible lines.
For more examples, see this thread: http://www.luxrender.net/forum/viewtopic.php?f=15&t=11450#p109700
any compiled rc2?
awesome dude thanks:D!!!
Is it true that KeyShot uses Luxrender engine?
Moreover I like new LuxCore system. It so fast than LuxGUI. Thanks!
I don’t think that it does 
(Not sure though?)
i saw some luxrender.so in the installation directory…