What I ultimately want to do is create a stencil for painting which I’ll print in 3d.
I’ve created a png with transparent areas for the lettering. I imported it into sketchup and exploded it and then extruded it to 3d then I saved it as collada for use in a 3d program. While sketchup shows the transparent areas but in other software it’s just an oblong block.
So what is the next step to save this as a solid with cut-outs for the lettering in a form that can be developed for 3d printing?