This tutorial was encouraged by the discussion on the Simulate old bw photo printing system topic. @Carla initiated the discussion and brought the style to my attention. @Eli, @Pixey, @MJW, @Ego Eram Reputo, @toe_head2001 and @welshblue contributed advice on the technique and encouraged the writing of this tutorial.
A simpler, faster method by @MJW of achieving the same results is described on this post of the same topic.
The original poster can be found at https://graphicdesign.stackexchange.com/questions/84987/how-to-do-line-optical-illusion-art-effects and https://www.pinterest.com/pin/523684262920581246/.
The tutorial will help PDN users create images in the same style as the original poster, for example:
@MadJik's Light Rays
@BoltBait's Paste Alpha and Object Tools, both part of BoltBait's Plugin Pack for PdN v4.2.12.
Procedure - 10 easy steps
Examples using different grids/patterns: