It can be a bit tricky replacing the ship decals, but it is possible
So, from looking at the Griff Wolf oxz, it's reading in the artwork for the decals from another oxz called "Griff Shipset Decals" which is filed under the "Miscellaneous" category on the oxz manager. If you're seeing a skull and crossbones decal appearing on your GriffWolf in game then you've got that oxz installed and all we need to do is open it up and replace the griff_decals_player.png inside it with your own artwork.
Right, this is where I'm going to get confusing, i'm terrible at explaining this stuff, like really really bad!
I'm on Windows 10 64bit, and i've installed Oolite to it's default location (C:\Oolite on my hard disk)- so to find the "Griff Shipset Decals" oxz I need to browse to this folder on the computer:
C:\Oolite-Trunk\oolite.app\GNUstep\Library\ApplicationSupport\Oolite\ManagedAddOns\ and oolite.oxp.Griff.Griff_shipset_decals.oxz
should be in there - might be different on Linux and Mac
The safest way to edit this oxz and not break anything in oolite is to copy it to somewhere on your computer and work on that version then pop it back into oolite's ManagedAddOns folder when we're done, so copy the oxz, then on the copy, rename the file extension on the end from .oxz
- so the whole file name is now oolite.oxp.Griff.Griff_shipset_decals.zip
You should be able to open this .zip file and now inside you'll see a 'Textures
' folder and inside that the file griff_decals_player.png
Rename your new ship artwork to griff_decals_player.png
and pop it into the zip overwriting the griff_decals_player.png that is already in there, I think that's all you have to do, you don't have to 'save the zip' it should do this automatically I think, but if it asks you to save the changes then say yes.
All we need to do now is rename oolite.oxp.Griff.Griff_shipset_decals.zip
back to oolite.oxp.Griff.Griff_shipset_decals.oxz
and pop it back into C:\Oolite-Trunk\oolite.app\GNUstep\Library\ApplicationSupport\Oolite\ManagedAddOns\ overwriting the one in there.
We should be ready to go, so start OOlite (you might have to do this whilst holding down the 'shift' key on your keyboard from the moment oolite starts loading up until the spinning cobra titlescreen appears - holding shift when starting Oolite gets it to reload in all our oxz addons again, it's to ensure that it sees our updated decal artwork.
hopefully you should now see the decal on your ship. Your artwork needs to be in a 'power of 2' size, so 1024x1024 pixels or 512x512 or 256x256 etc. if you save your art with a transparent background then the transparency will work in game too so your decal won't have a big square of colour around it!