I'm getting this strange effect (with 7.1.2.0) when exporting a model to Rail Simulator. The top image shows the lining looking ok in Canvas, but when I export to RS the lining gets slightly distorted. I've redone the boiler as a plain tube and its ok. But when I've extruded out the firebox shape from that tube I get the glitches (but only see them when exported to RS).

Unfortunately, I hadn't exported this one with an earlier version of Canvas, so don't know if this is a new problem, or if its just careless modelling on my part.

Richard Scott