sorry, i've re-read my post and it did not make lots of sense here was the question:

I've been using an old Nesa patch, Metaballs, and I want to make a cube in jit.gl.isosurf, not a sphere.

The sphere is being generated from maths in jit.expr. Can someone show me how to make a cube from it instead, or give me some pointers?

thanks Ben

-- Pasted Max 5 Patch, click to expand. --

A cube is trickier. You'll need to come up with a distance function for a cube. Have a look at this page: http://www.iquilezles.org/www/articles/distfunctions/distfunctions.htm

thanks for the answer, however i am struggling to understand how to implement the code from the page into jit.expr, do i understand this right? for making a cube in jit.gl.isosurf you would use a multi plane image with the xy being on the same plane and the z would be the plane number any more help would be fab!

thanks Ben

It'll be tricky to do with jit.expr because you need a length function. With jit.gen it's trivial:

wow thank you!! i am excited