One round of cleanup:
using Meshes, MeshViz
import GLMakie as Mke
path = "/path/to/image.raw"
nvox = round(Int, filesize(path)^(1/3))
buff = zeros(UInt8, nvox, nvox, nvox)
stream = open(path, "r")
read!(stream, buff)
close(stream)
colors = replace(buff, 0 => (:black,0.01), 1 => (:yellow,0.7))
grid = CartesianGrid(nvox, nvox, nvox)
viz(grid, color = vec(colors))