I recently developed some ornaments in substance Designer to add to a dress that I create in Marvelous designer. The problem is that I can't find a way to export each PNG image in transparency and what to do to adapt these ornaments to the different parts of the dress, which are curved.
Bakers, How to, Import & Export, Substance Graph, Substance Model Graph
The best method for having the ornaments match the curvature of the fabric depends on how the fabric is deformed and how the model is unwrapped. If the fabric is deformed in the model (e.g. using a physics simulation in Marvelous Designer) yet the UVs remained straight, then applying the ornaments can be as simple as laying them out in a straight row along the UVs and they will bend and deform to match the geometry.
If that is unclear or non applicable to your use case, you may share images of the mesh and its UVs so we can recommend a suitable method.