I think there aren't any graphic options other than changing the resolution of the game. At least I haven't found any. There's a config.txt file in the Documents\Oddworld\Stranger's Wrath folder. The only line in there which doesn't correspond to any settings you can change from the launcher is anisotropicon you can try and change that to anisotropicoff. Maybe this turns of anisotropic filtering for textures. Could give some speed gain on low-end hardware. I didn't notice any changes, but it runs fast enough for me either way.