Minecraft@Home

Minecraft@Home (sometimes referred to as MinecraftAtHome due to technical reasons) is a Minecraft community project that searches for map seeds. They are best known for their involvement in finding the world seed used for the Minecraft title screen panorama and the original Herobrine image.
Projects
Pack.PNG
Pack.PNG is a cropped PNG image found in the files of Minecraft. The image was first introduced and implemented in Alpha 1.2.2a when texture packs were first introduced, and served as the default texture pack icon until Release 1.13.2. It is currently used as the default icon, albeit in a greyscale variant. After the video was published, SalC1 contacted the developers Minecraft, Mojang Studios, on Twitter for information on the image file. Markus Persson, the creator of Minecraft, responded, being unable to answer the question.
Since the original image was low-quality, AI upscaling by using thousands of Minecraft screenshots was used, resulting in a higher quality 512x512 image. From then, a recreation of the image was constructed in order to compare with candidates for the original location. Minecraft@Home found the Z coordinate by using the pattern of the clouds. This was used to bring the potential seeds down to 700,000. The candidate seeds were then filtered through another program to check if they matched the height of the terrain in the previously constructed recreation. The panorama shows terrain of Minecraft filled with trees, a cliff and water. User Tomlacko started a search for this world seed after the pack.png project. Tomlacko managed to find the exact coordinates and game version by looking at the metadata of the images and the generation of the tall grass. andrew_555 reportedly took 50 hours to write the code to find the seed and took months of debugging to fix.

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