Editing & Loading Custom Graphics
Once the graphics have been dumped/ripped, the next step is to edit them. Locate the files you have recently dumped (in GBE+ data folder) and open them in an image editor of your choice. Decide on what scale you want, e.g. 1x for 1:1 replacements or something like 3x for HD replacements. Scale the source image appropiately by that factor, then make any change necessary. At this time, GBE+ only supports 24-bit BMPs for dumping and loading. Please make sure the images saved are in the correct format.
For sprites, GBE+ supports a transparency color. By default, this is ugly green (#00FF00) so use that color to make transparent areas. This color can be changed by editing the gbe.ini file.
#Loading Custom Graphics
When loading custom graphics, a manifest file must be specified. This is simply a text file that will tell GBE+ where to look for custom graphics and how it should load and handle them. Go to Options -> Paths and make sure the CGFX Manifest points to a valid text file. This manifest file will automatically contain entries if these graphics were dumped through the Advanced Menu of the Custom Graphics window. Otherwise, users will have to manually create the manifest file themselves. Read more about manifest files here.
Before loading a game, go to Options -> Display. Change the **Custom Graphics (CGFX) Scale to match the scale factor of the graphics you will be loading. Lastly, check the Load Custom Graphics option. Enjoy the results of your work.