3D graphics support

[z0w0]

Currently Helm exclusively supports 2D graphics, but the framework for supporting 3D is definitely there. It's important that a lot of research goes into this to figure out the best way to represent 3D graphics functionally. For e.g. 2D graphics is done by what is essentially a DSL, but 3D graphics might need something a bit more powerful than that.

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[theobat]

What about https://github.com/lambdacube3d/lambdacube-edsl ?