I wish I always had the motivation to work with 3D but i don't things that helps me stay motivated to work with 3D outside of work is to make it a bit about money, for example making something for the unity asset store or the dota 2 store, it helps a lot. Staying and working at the office helps me a lot, keeps me focused…
Time out for fact checks! Modafinil has the same general addiction potential as caffeine -- you build tolerance and can feel like you're unable to function without it, thus creating an impulse to use more to get your previous results. Additionally, it's not any better than caffeine at waking you up (cite), and I'd go for…