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Something different.
The whole idea with the outline distinguish between foreground and background. As you can see down bottom left a small amount of detail is lost in explosive bullets m1911 as it get smaller, even more will be lost motion.
In my opinion the outlined gun is easier to see.
What do you guys think?





very true, and this technique is applied (somewhat) to many animated cartoons, for example black outlines vs subtle outlines:
you watch that?