It's unlikely you're using a collimating lens, so distortion is presumed! Not only is the impact of distortion fairly minimal, with radial distortion (by far the most common kind of distortion - usually synonymous with 'lens distortion') it's actually an important aspect; the angles will follow the regular pattern of the distortion and the technique will still work (If your photo has non-radial distortion, DM me; I want to know what on earth you were doing to cause that, it was probably a really entertaining story). As in the above image, the random scattering of the intersections is the indicator that the image was AI generated, not that the lines do not intersect at a single point.