I recently built a Plex Media Sever.  As we all know, Plex assigns posters in a chaotic and random manner.  I would find one that In liked and start adding them, only to find that the whole set was not there.  Very frustrating.  And for someone with slight OCD this randomness was maddening.  Then I found TPDb.

I began by downloading posters, here on TPDb, in  the trading card format, but there ended up being so many different types that uniformity once again became an issue for me.  The result is I ended up creating standard full card posters, with a 20 pixel rim, usually in silver but sometimes in gold or a colour that is inherent to the poster (using colour picker).  In some cases I have stuck with a trading card version, if they are just too good, such as the case with some of the posters by Aloha_Alona, CmdrRiker and Mattiask57.

Ive been using mostly GIMP for the last month or so now, and I am gradually improving my knowledge of the program.