Thanks I had forgotten the isocurves, excellent and effective solution for my problem, thanks, however the color options may have another option to consider separate surfaces, it could be useful to have sharp edges and separate surfaces between them, such as when you split the surfaces like in this case below. The green one has separated surfaces the other one only different colors but but the same edges, on the left the source file imported inside without touch.



Then could you also consider the possibility of inserting a support for BRep and glTF, import and export?