Ccdstack
Users could watch a "stacking movie" where the software played a slideshow of every image in the stack. You could physically see an airplane fly across your frame and manually "zap" it out. This level of control allowed imagers to create photos with zero artifacts—images that were technically superior to automated outputs.
This linear, non-destructive workflow was revolutionary. Users could reject bad frames, fix a bad calibration file, and re-stack without starting over. ccdstack
During this era, if you looked at the "Processing" section of any top-tier astrophotography forum (like Cloudy Nights), you'd see the same phrase over and over: "Stacked in CCDStack, finished in Photoshop." It was the perfect bridge between raw telescope data and artistic processing. It wasn't flashy, but it was reliable . Users could watch a "stacking movie" where the
CCDStack was famously difficult to learn. It had a steep learning curve and a very utilitarian interface. The developer, Larry Weber, eventually partnered with the creators of (another processing tool) to bundle software, but the era of CCDStack as the "King of the Stack" was ending. This linear, non-destructive workflow was revolutionary