@poju, maybe this will work:
1) Import assembled model with all parts aligned into MeshMixer
2) Click on “Edit”
3) Click on “Make Solid”.
4) The display would look morphed or eroded when it welds and merges all the parts so play around with the following settings:
a) Increase “Sold Accuracy” from 128 up to 512
b) Increase “Mesh Density” from 128 up to 512
Values of 512 in both will give you the same look as your original model but this will increase the number of faces on the model. If too many, Robox will probably not have enough memory to load it in Layout. Set to lower if this is the case.
5) Export the model.
@mikeklein if it is just memory requirement then it is quite possible that only thing that is needed is to increase maximum memory for JVM in at startup. Definitively something AM developers would need to do…