I wanted to re-skin a creature, in this case a Troll. I've followed the video tutorial (listed in the sticky) that shows the re-skinning of a chicken.
I've used FOMM to extract both the .dds and _n.dds.
I've tried both GIMP and Photoshop - both with their own dds plugins. I've exported / saved as a .dds or _n.dds as appropriate using DX3 and DX5 - not 100% sure that's right..
I've placed the files in the correct folders in the DATA folder, using the correct paths. Also took the .nif file and placed it in to the appropriate loose folder too.
When altering the skin texture in CK and picking my new .dds I get a warning. Off hand something like "problems swapping out texture, see warning file for details"
The Warning file, contains a reference to rim lighting being missing - I think.. I'll have to check when next at the right computer.
EncMyNewMonster can be placed in to cells in the CK.
It does not appear in game.
I've tried pathing the new files with NifScope to see if that did anything - other than showing the new texture in NifScope, nothing else seemed to happen. Have to point out - I know nothing about this tool, other than a few googles have shown me.
Now I'm stuck.

It's going to be something I've done, or not done. Hopefully it will be something simple.
Nag.
EDIT:
This is the text that appears and is also in the warning file:
TEXTURES: BASE data\Meshes\actors\troll\character assets\blacktroll.nif : Troll Cave is missing a rim lighting map
TEXTURES: Warnings were encountered during texture swap for model 'Actors\Troll\Character Assets\BlackTroll.nif'. Check warnings file for more details.
TEXTURES: Warnings were encountered during texture swap for model 'Actors\Troll\Character Assets\BlackTroll.nif'. Check warnings file for more details.
This appears when I change the texture over to my new one, in the skin texture doohicky.