3D cube with sphere cutout, outside

using AbstractPlotting

scene = Scene()
r = range(-1, stop = 1, length = 100)
mat = [(x.^2 + y.^2 + z.^2) for x=r, y=r, z=r]
mat2 = mat .* (mat .< 1.4)
#plot the space outside
volume(50..100, 50..100, 50..100, mat2, algorithm = :absorptionrgba)