I’ve seen this problem posted before but it seems to be a pretty critical problem… Is the only real work around to explode all the interior components? My high poly trees go from 600kb to 100mb once fully exploded and really cramp my model. I could remove the render only but then I can’t use skatter to modify the parameters of the components once they’ve been regenerated.
Ok so, as stated in the other thread, this is clearly an issue in V-Ray itself, as it render fine in Thea and other rendering engines.
Can you contact Chaos Group directly? Maybe post on their forums, they are usually quite responsive there. Make sure to include the file, I’m sure it will be useful to them.