I recently installed a few mods (No More Blocky Faces, Detailed Faces v2, Enhanced Night Skyrim, Large Address Aware, Lockpick Pro, Glowing Ore Veins 300) afterwards Shadowmere has become transparent in areas. And it's not a smooth transition from solid to transparent but a pixilated gradient. Has anyone else had this problem and is there a solution? Thanks for your time.

The only mod Im using is the improved faces mods and the nvidia ambient occlusion mod and now all the kajiit and trolls are all semi transparent. Basically anything with furr.

I had this issue and tracked it down to transparency multisampling in my graphics card drivers, moved up to supersampling and it works fine again.

Supersampling fixed it. Thank you very much for your help.

No problem, it's not a 100% perfect solution and it consumes more GPU resources but as far as I know Nvidia will be fixing this in an update.