[Spookyer (Brett)]

Hello

I have been working on this bloody 2 panel mosaic for 4 nights now, making slow progress with the help of the internet and kindness of forum members like RickS who take pity on my feeble Pixinsight skills.

I have just tried to combine my merged Blue Green and Red panels together and I am getting the error message

"Incompatible source image dmensions"

When I check the image sizes all three are different by one pixel in either the height or width and my Lum image is as well. I really don't know how this happened given I used the Dynamic crop tool earlier in the process and dragged the process icon onto each image.

Anyway I don't know how to fix this. I tried a Star Alignment but it didn't seem to do anything. Looking at the dynamic crop tool you can specify a pixel size so I can make them all the same size but how do I make sure they all line up as well when I do this as I don't how they are offset?