[hazeii]

Change the code from M4 to M3:-

>#define C1(x,y) M3(XF(x), YF(y), XF(x), YF(y)),

>// ^- change this to 5 or 6 to increase detail

[yreg]

  // ^- change this to 5 or 6 to increase detail or to 7 or 8 to melt your computer