Bridge to Rhino3d
Rhino3d or .3dm files are the only way / best solution to flatten / unroll a surface for my needs in card modeling. But when converted to a rhino nurb to use all the flattening/unrolling functions all UV information is destroyed and needs to be rebuilt. Using anything else such as pepakura designer will work but the quality of the end results are poor to say the least. Once the object is flattened you are extremely limited and have to resort to a vector program to texture your card model. The best way is to paint in Rhino3d on the rhino nurb, flatten the object, then export directly to print ready format. We need to either be able to read a .3dm file in substance painter or have a 2 way bridge to Rhino <> Substance Painter

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a_mattano commented
Yes, a real-time Bridge to Rhino3d will bring a big community to Allegorithmic world. As for example the Architecture, Industrial and Transportation Industry. Probably you will duplicate your sales.
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alexaser commented
Yes please. The .3DM file format it is well documented, have an open SDK and to have support in Substance will make happy a lot of CAD professionals including myself.