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Here's a formula that multiplies a square wave with a random frequency on the X and Y planes and then moves the resulting surface through X and Y by the same random frequency square waves at a 10-20 times lower frequency create a totally unpredictable labyrinth type formula, and there are also C64 type game sprites on it. it's very very fast and it is perhaps a good addition to fractal hybrid programs. If you can figure a way to make it have many gradients of size that would be awesome.

http://www.thingiverse.com/thing:1985936

There's a lot of control of the random startpoint, the shapes, and the density/void ratio of the render:

 labyrinthIsoSurface();
  
    ridgeDensity = 1222;//higher values compress the random oscillator at higher frequency
    brickDensity = 0.45;//regulates the difficulty of maze
    mixIntensity= 0.02;
    mazeSize = 100;
    
module labyrinthIsoSurface (){

 for( j = [ 1 : mazeSize ])
   for( i = [ 1 : mazeSize ])
   {  

        li = lfo(i*ridgeDensity)*547.154;//random lfo values
        lj = lfo(j*ridgeDensity)*457;
        xc= (lfo(j*mixIntensity+li) + lfo(i*mixIntensity+lj))*.25+brickDensity;//
       //xc= (lfo(li) + lfo(lj))*.25+mixIntensity;//run this version to see simple version of maze
        
        rd = round(xc)*55;
        //echo(xc);
        if (xc > .5) // if isosurface is small, build wall cube
        {
            translate( [j ,i, 0])
            cube(1);
        }
   }
}

function mod(a,m) = a - m*floor(a/m);
function lfo(xx)= mod(abs((sin(floor(xx))*0.01246)*32718.927),1.0)*2.0 - 1.0  ; //erratic sin
    //low frequency oscillator function similar to synthesizer robot sound like R2D2

Can you code this using mb3d's jit or using my DIFS framework?
I don't understand fully your code