I bought an armour set I'm trying to apply to my server but the size of the armour layer 1 and layer 2 is 128x64 for some reason, Optifine only correctly renders armours that are 64x32 in size.
I saw a note on Oraxen's wiki talking about that and would like to know if it was possible to do this with Itemsadder (https://docs.oraxen.com/configuration/custom-armors)
This was the note:
Make sure your armors resolution fits the value set in settings.yml. By default armor_resolution is set to 16. This means that your textures must be 64x32 pixels. If you want to use a higher resolution, you'll have to change the value in settings.yml. For example armor_layer files with 128x64 pixels must have a resolution of 32 in settings.yml. You cannot have some at 64x32 and some at 128x64, it is either or.
Also make sure that the bit-depth of your textures is 32 bits. Anything else means not fully transparent, and the pixels the shader uses will be black. This will not break Optifine/Iris versions but will break all vanilla versions.
