china_landscape {
fractal:
  title="china_landscape" width=320 height=426 author="Giuseppe Zito"
  created="June 15, 1999" numlayers=3
layer:
  caption="New Layer 4" opacity=29 visible=yes alpha=no
  mergemode=difference
mapping:
  center=0.0180818694634243981/-0.0284677032803070183
  magn=225.8791225020333 angle=0
formula:
  filename="zg.frm" entry="wspiral" maxiter=200 percheck=normal
inside:
  transfer=none repeat=yes
outside:
  filename="dmj.ucl" entry="dmj-Triangle" transfer=sin repeat=no p_apower=1
  p_aflavor="normal" p_power=2 p_bailout=1E20
gradient:
  smooth=yes position=72 numnodes=5 index=9 color=13891318 index=59
  color=1330034 index=78 color=3425331 index=134 color=16497322 index=254
  color=9057544
layer:
  caption="New Layer 2" opacity=100 visible=yes alpha=no
  mergemode=hardlight
mapping:
  center=0.0180818694634243981/-0.0284677032803070183
  magn=225.8791225020333 angle=0
formula:
  filename="zg.frm" entry="wspiral" maxiter=200 percheck=normal
inside:
  transfer=none repeat=yes
outside:
  filename="mt.ucl" entry="mt-popcorn-trap" density=0.01 transfer=linear
  repeat=yes p_color_mode="Distance" p_start=0/0 p_a=0.05 p_skip=0
  p_no_of_iters=4 p_max_iterations=10 p_scale=0.01 p_randomness=0
  f_fn1=asin
gradient:
  smooth=yes position=4 numnodes=8 index=5 color=4396810 index=75
  color=16774624 index=142 color=4720 index=167 color=14 index=188
  color=4154031 index=216 color=12255231 index=252 color=2112138 index=303
  color=6310448
layer:
  caption="New Layer 1" opacity=100 visible=yes alpha=no mergemode=hue
mapping:
  center=0.0180818694634243981/-0.0284677032803070183
  magn=225.8791225020333 angle=0
formula:
  filename="zg.frm" entry="wspiral" maxiter=200 percheck=normal
inside:
  transfer=none repeat=yes
outside:
  filename="mt.ucl" entry="mt-dist-est" density=16 transfer=cuberoot
  repeat=yes p_r=0
gradient:
  smooth=yes position=-19 numnodes=5 index=18 color=13697022 index=249
  color=13301247 index=315 color=4537157 index=334 color=589952 index=366
  color=988416
}

zg.frm:wspiral {; Giuseppe Zito
 z = pixel ,

c0 = 0.085466

c2 = -0.97347701

c9 = 0.44871801

c15 = -0.33126301

c17 = -0.19959199

d2 = 0.155949

  : 
 x = real(z), y = imag(z)

s0 =c0

s1 =c2

s2 = x

s3 = y

s4 = x

s3 = s3 *s4

s3 = s3 *x

s3 = s3 -y

s3 = s3 *c9

s3 = s3 +x

s3 = s3 *x

s2 = s2 *s3

s2 = s2 -y

s2 = s2 +c15

s1 = s1 *s2

s1 = s1 *c17

s1 = s1 +x

s1 = s1 +y

s0 = s0 +s1

newx = s0 

s0 = y

s0 = s0 +y

s0 = s0 *d2

s1 = y

s1 = s1 +x

s1 = s1 *y

s0 = s0 +s1

s0 = s0 -x

newy = s0 

z = newx + flip(newy)
 newx < 4 && newx > -4 && newy < 4 && newy > -4 
}