Well, all my 3D skills are a work in progress, and lighting and post processing are definitely not my cup of tea yet, BUT, I didn't use 3-point lighting because I want it to look like a dungeon, not a studio. I'm also trying to do a bit of story-telling with the lighting, the full pin-up set is 14 images, which I'll upload here after they are available on Patreon, the artistic choice will hopefully be more obvious as the scene progresses.

The scene is lit mainly by the torches, they are prop-lights and they have orange-tinted point lights. The dungeon cell has a blue-purple light to differentiate it from the outside. There's a spotlight that changes position from image to image, mostly using it to achieve a make-shift vignette effect, or direct focus or break up flat color areas. I did realize a little too late that the orange colored wallaby in an orange lit scenes is not the best idea. What I should have also done is added in that fur-edging effect that Kicky the Roo has. I actually removed it because this model is destined for use as pre-rendered game sprites for RPG Maker and the edge effect doesn't look good in sprite size. The theory is that I can achieve a model that looks good as both a small gameplay sprite, and as a larger model for status portraits and cutscene artwork and so on.

I don't really understand fake camera post processing techniques. I mean sure, if it's meant to match live action footage, that makes sense, but for pure CG scenes, if you have the ability to make something more clear and realistic than a camera, then go for it. But then, this isn't supposed to look realistic, it's supposed to look cartoony, so if I was going to post-process it, I would be looking into stuff like edge lining and paper textures or screentones. Depth of field might work, but I worry that a realistic looking effect like that combined with such a cartoony character and background would look odd.