which is why the four-finger design is mostly avoided by Japanese animators. Plus, the four-fingered hand sign has derogatory caste-based associations, and the number four is often deemed unlucky ...

Finger stretching is important for increasing the range of motion and flexibility in your hands. Simply extend your hand out ...

There is, however, one country in which a four-fingered animated hand ... finger added there. Which, I assume, is the ...

Could the four fingers be a simple mistake in the post-production process? Perhaps the missing finger was in the original image but was erased without Photoshopping the rest of the hand to compensate.