So the scene converter is pretty much the same as in coronatools, takes the most top layers only. We need the nodes!
I'd at least convert the two diffuse channels into a fusion shader in the CRN diff. channel.
The spec. channels are tricky. If maps are used to mask each channel, then the layer shader could do most of the jobs, except for IOR and anisotropy.
And it'd be really great if the CRN diff. chn would become invisible when the level is set to 0.
btw, thx for fixing the mat. preview.