Supported file types in Perfect Layers 1
Perfect Layers uses the Adobe Photoshop file format as its native file type. All files created and edited are saved as .PSD files which may be opened and edited by Perfect Layers, Photoshop, Photoshop Elements or other applications that read the .PSD file format. The files are saved with Maximum Compatibility enabled. All layers and layer masks are preserved.
Perfect Layers can import many file types as new layers into the open image including Photoshop (.PSD), Tiff (.TIF), Jpeg (.JPG) and RAW files from most digital cameras in either 8 or 16 bit RGB color modes. (See this article for a full list of supported RAW files) Selecting multiple files from the Open dialog or from inside of Lightroom will merge all of the selected files into a new, untitled layered Photoshop file.
Perfect Layers can also export flattened versions of the open Photoshop image as either TIF or JPG from the File > Export menu.
Please also review this article for opening existing .psd and .tif files.