This is a plot/heightmap of a function of two variables that I have discovered. It shows the region from [-3,-3] to [3,3] with grayscale values adjusted so that white/black matches the maximum/minimum value in the plotted region. The function formula is following: gaussian_curve((x^2) mod (abs(sin(x + y)) + 0.001) + 
(y^2) mod (abs(sin(x - y)) + 0.001)).
<a href="//commons.wikimedia.org/wiki/User:Drummyfish" title="User:Drummyfish">Drummyfish</a>
<span class="int-own-work" lang="en">Own work</span>