Calibration test image for Makie

shadercalibration.jl

using Makie
using Colors
n = 100
f(x) = 0.5 .*reim(((x[1] + x[2]*im)/33)^2)
function f2(x) 
    0.5.*abs(2*(x[1] + x[2]*im)/1089)
end
#f(x) = (x[1],x[2])
#f2(x) = 1.0

αs = vec(CartesianIndices((n,n))) 
βs = (f.(αs))
Δ = [f2(α) for α in αs]
γ = (1-pi/4)
fig, ax, plot = scatter(first.(βs), last.(βs), markersize=Δ, color=:black, strokewidth=0,  markerspace=SceneSpace)
ax.aspect=DataAspect()       
lines!([1.2, 1.2], [0, 15], linewidth=50, color=RGB(γ, γ, γ))

The true value for the aliased grey should be #373737 or grey(1-pi/4) , because the image is a distorted square circle packing and each disk covers pi/4 of a square