Based on your request, it seems you are referring to a tool designed to solve or generate autostereograms (often known as “Magic Eye” images). While there are multiple tools available for creating or interpreting these 3D illusions, the most prominent one recently is a stereogram solver created by piellardj.
3D Scene Solver: This tool is designed to reveal the 3D scene hidden in a stereogram by revealing its silhouette.
How it Works: It works on most autostereograms, particularly those that have a simple plane as a background.
Purpose: It helps users visualize the hidden 3D object when they have trouble seeing it by just staring at the image (which requires aligning your eyes so they look through the image at the wall behind it). Other Tools:
Easy Stereogram Builder: This is an online tool used to generate custom stereograms by creating a “mask” (a grayscale image where white represents closer, black represents further).
Stereogram Creator PRO: A Windows app to create 3D stereograms from 3D models.
These tools all work on the principle of generating or interpreting random dot stereograms, which were popularized in the 1970s and 1980s to show 3D images.
If you are trying to create your own, I can tell you more about the difference between random dot and object-based generators. Which one are you trying to make? Stereogram Tutorial – how it works, step by step – IME-USP