Hi @Tetra_InTeLLeGer, I’m not quite sure the effect you are trying to achieve here, but if you are just looking to capture the general shape of an object, I would suggest using the Custom Depth instead. You can even use Stencils to track multiple different shapes in different passes.
This forum answer goes into setting up custom depth to work with Scene Capture 2D:
If you need more information on Custom Depth in Unreal, Tom Looman has a great tutorial series: