I have got a strange shadow on my obj model (picture's right), but when I put a light pointing upwards from bottom, the shadow don't appear (picture's left). I saw some message say this was caused by inverted normal. But this was not happen in the modeler, only in poser. If those polygons really had inverted normal, should I saw a hole there, or a dark shadow like this? How can I make it correct ? Thx!