Hi, Paolo: I guess you read my discovery comment I posted in another thread. But, just let me repeat it. It's the same, I believe, as others mentioned. I had been trying to render a scene on which I used the EZSkin v2 shader. That's why I got all the error messages. If I just use an M4 with the basic texture, it renders fine. I also tried applying a texture I had bought for M4, but without using the EZSkin shader. Same thing: all kinds of error messages. So, I guess Reality3 has trouble finding the materials or textures, at least in some cases.