the 30,000 limit is probably rounded to the nearest big decimal; in all likelihood the actual hard limit is 32,767, which is the highest value of a signed word (16-bit integer), the type of data representation that is likely used to store the image dimensions internally.
Learn how to optimize Photoshop for maximum speed, troubleshoot common issues, and keep your projects organized so that you can work faster than ever before!
Related Discussion Topics
Nice and short text about related topics in discussion sections