Thanks Chip. I never dreamed that the default units in Blender were metres. That is one giant monkey! Your video certainly explains why my model started out so large when I brought it into Blender. However, I don't really care what the scale is or if it agrees in MOI and Blender. I'm only trying to render this one model, so the scale should be (?) irrelevant. What I was wondering about was if the scale affects the quality of the rendering. Also, because I inadvertently scaled the camera, I wondered if that would affect quality. I guess I should show you what my (personal) problem is. This is the best that I've been able to do. I specified 'Glass', but it doesn't show as such. And the 'Sun' doesn't produce anything like 'sunlight'. I had to add some area lights just to bring out some of the totally black areas of the model; and these reflect in the paint which gives the wrong effect. This is the best that I can do. I don't know what else to change as I have already specified what I want, and this is the result. Anyhow, as I said, this forum is not about Blender and I didn't offer this model to get into all this. But some of you have had fun with the model, so that's what matters.
Bad render in Blender.jpg