use -force-opengl start unity

original raymarching blog | r | / d = rd / 1.0 should be rn / d = (rd /(rd).z) * d then | r | = (rd /(rd).z) * d Use this https://www.shadertoy.com/view/ld3Gz2 snail shader inside untiy just want to give original project a try creating stuning image.