I was playing a little bit with horde3D when I tried to change the material of the knight. I tried to change the material of the knight helmet, in the example, and I found that the rest of the knight was invisible when Ive started the program. Then, the rest of the body became visible only if I get DONT look at the knight. And the animation of this part of the knight is working only while i'm not looking at the knight.
Heres some screens:
First, When I start the application, only the helmet is visible:
And, if I dont look the knight, the body appear and became visible but without animation( While I'm not looking at the knight ):