kami wrote:I don't understand the technics behind it, but it is working great with rhino block instances. So I was really hoping, it would be possible. I wouldn't even mind it would always hide all instances for the same MXS if you gave it the invisiblity flag ...
Create an MXS Reference in Rhino (use a simple MXS, to make things clear), and then make one copy of it. Export to Studio, and then play with the visibility flags on the reference, and on the instance of the reference. You should see what I'm talking about, and why it creates a problem for exposing those flags in the plugin. The only real control we have here is wholesale hiding (as opposed to hiding to camera, etc) of MXS References in Rhino, which you should do using Rhino's normal object (or layer) hide/show commands.
On the second question, I couldn't say much, except that maybe you're using Pack & Go in the plugin, and that this is why it works in that case. There is also the Render Options > Materials > Search Path in Studio, which you could try -- but where this is one path, in the plugin, I read all the referenced MXS files, and the file references in them, and add search paths for them all. This information is written into the MXS file by the plugin, so it should travel along, but I don't personally know how it is handled in Studio; perhaps it is lost, being replaced by the one Materials > Search Path path.