It's a priceless resource nevertheless.

and sqrt( sdEquilateralTriangle(pos.xy, 10)**2 + sdCircle(pos.xz,10)**2 )

seems like there's scope for a nice little domain specific language to.

I think it would be interesting to have some composite operations that did probabilistic branching based upon a hashing RNG to conditionally combine shapes

something like

    float thingy(pos,r) {
      float more = infinity
      float pseudoRandom = HashToUnit(pos) 
      if (pseudoRandom >0.5) {
        float direction=randomAngleFromSeed(pseudoRandom+r)
        more = thingy(pos+direction*r, r*0.75) 
      }
      return  min(circle(pos,r),more)
    }