2026-10-09 APP 2.0.0-beta48 has been released !
This is mainly a bug fix release for the reported bugs in beta47. In addition it has a significant User Interface performance improvement noticable when you need to process 1000s of images in APP.
2026-10-03 APP 2.0.0-beta47 has been released !
This is a very big release... many code optimizations/rewrites, many parts of APP are much faster and more precise, especially star analysis and registration are much faster ! Big mosaics will go much faster 🙂
And we introduce a new preview filter, which includes the new Adaptive Deep Sky Stretch and a General Levels Stretch, this has been long over due. The old preview filter (the panel on the right side to stretch and preview your data) has not been updated for a couple of years and it is a critical part of any APP session.
Adaptive Deep Sky Stretch or ADSS is a much more intuitive stretch algorithm. It is also color preserving (which is a great new addition in itself ! ) which means that the highlights are no longer bleached, color is maintained from the linear data while stretching. You can simply stretch your data using the sky background level and signal width sliders which work much easier and more intuitive. You no longer need to fiddle with the old complicated sliders with zoom buttons. All the zoom buttons for the sliders are made redundant. And you can enter slider values in the slider value fields yourself. I will make a youtube video in the coming days to explain and fully introduce ADSS. Once the video is ready, it will be highlighted on the forum.
RGB Combine upgrade !. The RGB Combine Tool has been rewritten mostly. The tool is faster and easier to use and most importantly, the Luminance slider to inject a luminance channel or channels into the RGB composite is now working correctly. It no longer bleaches the RGB colors. Combined with the new ADSS preview, you will get much better and easier great composites with great color! I will also explain this in a new youtube video.
Hello!
I just finished my longest project. It's a 3x2 mosaic of the Veil Nebula. It took me 12 sessions to finish the shooting and I ended up 599 frames.
I put everything in APP, carefully matching the sessions of lights and flats together.
The integration ran more than 8 hours and I needed to uninstall almost everything from my computer, because it needed 900+ GB of space. 😀Â
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And the result was quite wierd and I don't know why.
In Calibrate and Analyse stars menu, I didn't change anything.
In the Register menu I set the registration mode to mosaic.
Nothing changed in Normalize.
In the Integrate menu I set MBB to 10%.
Is it connected to the Dynamic distortion correction, because it is enabled by default and I let it that way?
Can you help me determine the problem?
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It may be that you need to disable the distortion correction, some data doesn't actually require it and if the data is good by itself it can cause weird behavior indeed. Normalization I would switch to advanced mode btw.
@vincent-mod Your suggestion worked. Thanks! However the processing took quite a lot of time (19 hours on a Ryzen 9 5950x with 32GB RAM)Â and needed 1.2TB storage space to finish.
Also, these strange artifacts appeared in several places on the final image and not just in red, in green and blue too. Any idea?
This is the final image. I removed all of these artifacts.
Thank you again!
Those red dots are likely hot pixels, when a mosaic is created there is no outlier rejection taking place, you can set that up manually if you want though. If you make the panels one by one first (recommended) these should be gone already.
