Realtime version: https://t.co/MC59RO4BkI
— inigo quilez (@iquilezles) October 25, 2021
Not an an SDF sadly. @henryseg, do you have an implicit definition f(w,x,y,z)=0 around that is equivalent to your parametric version? I can try making A(t) a function of z, see how far I can go. But you've probably been there already.