Teen Titans and Totally Spies are horrible examples. Those are obviously not Japanese-animated, but rather done in an imitation style. While I salute these series for their attempts, I emplore them to try harder to develop and stick to a style they know they can continue to use, and one day call their own.
I must admit my explanation earlier really didn't explain properly what I meant. It's in actuality an eye you develop after many years of watching anime. Youre able to see the evolution of Japanese drawing and rendering styles, and when you encounter you suspect is not quite right or consistent, you should pretty much know it's not anime. It's not just the drawing style or shading style, but also the angles from which they were drawn. The Japanese often like to make their anime as cinematic as possible (within their given budget), but cartoons I've seen don't do enough of this. When it comes down to it, it's really more of an eye, and a gut feeling that you get over time.
I must admit my explanation earlier really didn't explain properly what I meant. It's in actuality an eye you develop after many years of watching anime. Youre able to see the evolution of Japanese drawing and rendering styles, and when you encounter you suspect is not quite right or consistent, you should pretty much know it's not anime. It's not just the drawing style or shading style, but also the angles from which they were drawn. The Japanese often like to make their anime as cinematic as possible (within their given budget), but cartoons I've seen don't do enough of this. When it comes down to it, it's really more of an eye, and a gut feeling that you get over time.