is there any way to get a step file as output?

[Trustmega]

I'll be printing this on a industrial resin printer. For that I need to edit the files a bit, for example make the brain less solid and make my own custom supports.

Can I get an step file as an output or any way to let the programs make the brain less solid inside?

[skjerns]

Usually this is done in the preparation step for the printing (slicing). There you are able to set the infill? However I have no experience with resin printers.

This step is not included in the repo, but done in your slicer software.

You could also edit the mesh in tinkercad or blender.