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.
Hi Mabula/Vincent,
In the UK we have recently had the benefit of several successive clear evenings - amazing! As a result I have lights captured with the same camera/optics, for the same objects, captured over several evenings. Â
If one has different calibration frames (flats) for each evening then I can appreciate the need to load the lights and corresponding flats into different sessions so they are correctly matched. Ditto if one has lights captured with different imaging systems
However I do not regularly capture flats for each sesson, so wish to calibrate several evenings' lights with the same calibation frames.  This being so, is there any value in loading each evening's subs into separate sessions for processing/integration.    I can appreciate that there will be variation in seeing etc between the different evenings, as there will also be between subs captured during the same evening.
So my question is, is there anything in the way APP works that would benefit my loading my subs captured on different nights into separate sessions, and if so can you explain why?
Thanks in advance, and also for a wonderful product
Mike
Hi Mike and thank you!
Well, you can just load them up into 1 session, no problem. It's indeed handy to have multiple sessions when you want to calibrate them with different flats and such. And like you say, different conditions might be handy to have in different sessions as the quality stacking for instance will then be done per session and not in 1 (which results in the night with overall lower quality having less impact on the final result). This is to get the best quality end-result, but if you don't really care and just want the best signal then you can put them all into 1 basket. 🙂 Multiple sessions also allow you to integrate them per session and all at once at the same time, this allows you to tweak each session a bit in the end and then combine those again for instance. Or you put the lower quality session into a seperate folder and the highest in another and after a year or so you do a massive integration of only the highest or lowest qualities or both. It gives you more flexibility.
