Assign/Design 3D editable layers to a base 3D model (garment/clothing industry)

We need 3d editable art layers to be added over the top of the base 3d model we have attached for your review. We also have a sample of a competitors app working the exact way we need ours to function. We have the 3d model of the full garment with sew lines constructed from pattern files we now just need the 3d editable graphic overlays created to be assignable in the backend and overlayed onto base 3d model. We need someone who understands this for garment 3d layers that will be assigned color changing properties in the app. We can email the file as its 85mb