As most of my designing ends up as printed parts It would be handy to be able to set material to FDM style 3D printing material, maybe as a sub menu off materials so you pick ABS as main material but can then choose printing specs like .2mm layer height, 0.4mm nozzle diameter you would also need to set a layer direction. I am sure someone out there has done analysis of inter layer adhesion and other stress characteristics, maybe you could partner with one of the manufacturers like Polymaker for stats.
I only print FDM currently but there could also be materials for
- Stereolithography(SLA)
- Digital Light Processing(DLP)
- Fused deposition modeling (FDM)
- Selective Laser Sintering (SLS)
- Selective laser melting (SLM)
- Electronic Beam Melting (EBM)
Some are not ever going to be structural prints but a lot have that capability especially with new materials appearing all the time.