I found a BJD doll model and I'm printing it at 50% of its actual size. All the pieces have sliced and printed very well, except the forearm. The problem is this: in the "solids view" it looks fine, but when I apply the "layers view", I see very strange gaps in the upper part of the model. Obviously, when I print it, the output is not the expected. It's the first time something like this happens to me. What can be failing?