This is an experiment in using composite modes with canvas rendering to achieve a 3d effect, allowing users to “paint” shapes in cardboard. At present, it’s possible to draw shapes with the mouse, and to erase them, all the while maintaining the illusion of 3d cardboard, thanks to both an interior and exterior layer.
This is just a start though- I’m hoping to develop this into something much more interesting.
To see what I have so far, head here, or just click on the image.