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 have processed 3 sessions and the process took 12 hours to finish.
I see two temporary files which take 213Go and 106Go.. Is it normal?
I use an external HDD with USB3.
 Thank you.
@albertderycke I have forwarded your question about the file sizes to Mabula.
A question for you. Is your external disk indeed an HDD or is it an SDD? HDDs are very slow in I/O and they slow down APP processing considerably. SDDs on the other hand are very fast. I use an SDD myself.
Thank you very much @wvreeven. It's a HDD so I'm aware about it's very slow but I have no choice at the moment because my Macbook internal SSD (But i'm on a Windows partition) has 256Go of capacity and the temporary files weight 300Go. So if the weight of the temporary files can be less heavy, I'll can use my internal SSD.
Hi Albert @albertderycke & @wvreeven,
Yes it is normal, 12 hours is very long though, how many images did you process?
The temporary files are the layers of the Stack before the integration is complete. Once the integration is complete, the temp files will be deleted.
APP works like this, because we can then use Local Normalization Correction features. Going forward, it will also enable us to do dynamic deconvolution in the whole stack which will be really great...
The temp file of 213GB is for the regular data, the 106GB file is for the Multi-Band-Blending functionality.
Hi @mabula-adminÂ
I processed 130 lights and 50 Dark/Dark Flat/Flat
Too bad it takes up so much space because I don't have 300Go of internal SSD space... But's if it's normal and you can't reduce this temporary files, I let my process write on the external disk drive for half a day.
Thank you to read me.
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