I work in PS the stacked astrophotography images that coming in Raw 32 bit .tiff and then saved in 16bit when working in PS after the first streching on the stacked image.
When I finish working on the image I use to save it as .tiff not compressed. Usually the image I work can be around 250Mb - 650Mb or even further, 1.2-1.6 Gb. depending the numbers of images stacked etc. I work under windows, my PS version is 2015.5.1.
Several times I found that when I save the image I'm working, the thumbnail show well the pic but almost all the time shows a split image, distorted of the object I was working as you can see in the pic bellow. Also happen that I could not even open again that image. I just always save the work after I flatten all the layers, in the same format .tiff 16 bit. No compresion or layers added. As you can see in the pic bellow, several images where saved while was procesing that image, the .jpg is not the problem, but the .tiff, that some show a properly thumbnail, but other a split image. All the images in the pic I can open in PS, but as I say before, happen that sometimes I can not opened as say memory is out of RAM (In Perfomance is set at 26Gb)
What I'm doing wrong? Are the saved .tiff files afected in some way because the tumbnail is not showing properly the pic?. It depend how big is the file? Can I do a Save As in a layer in the middle of the work showing me that stage only? Is the best way saving the files under .tif or is better in .psd?
Odd thing is, some of the splitted thumbnail images (images are around 277Mb) can be opened in other image software, but others don´t. (GIMP, RawTherapy, ACDC)