Plattar supports images in PNG or JPEG format. Although we will resize oversized images automatically, we recommend that you resize them before uploading, to make sure your users get the fastest possible load times.
For most cases, optimizing images for Plattar is the same as optimizing them for the web. For example, if a button will always be small on screen, it would be best to resize it to 256 pixels, rather than uploading a full 1500 pixel version.
You should also use the right kind of compression on your images. If you are unsure, its best to use JPEG compression at around 75%.
Try selecting all the images you will use in a single scene or page at once on your computer. If the total file size is over about 3MB, consider resizing or compressing some images.