Can someone explain to me the zip file format? It appears to contain a number of png files and some gcode. However, when I try and make my own zip file I get an error loading it into Chitubox saying that it is an invalide file format. From Chitubox I have sliced a model and saved it as a zip file and then read it back in without problems. However when I unzip the same saved file and then zip it back up with zip command in linux and load it into Chitubox, then I get the same invalid file. So I suspect I am not using the proper compression or settings with the zip command. Has anyone had success in making their own zip file and reading it into Chitubox?