I have recently made two sets of garage doors from Accoya with Tricoya panels - they are not painted yet, so cannot prove it; however, I would expect them to look like any framed and panelled door - ie nothing unusual.
One relevant bit of advice I got from the Accoua technical people was to avoid sanding the Accoya too much - because the growth rings are very wide, you can end up sanding out the pith and this would leave a rippled effect.
Paint wise, they recommended end grain sealer, followed by Zinsser 123-plus, followed by Sikkens paint.
Hope that helps
Cheers