Erik Hofman <[EMAIL PROTECTED]> said: > There are still some weir artifacts I can't explain. > > First there's the black tail (??) > And if you look carefully you also see there are sections that don't fit > nicely to the rest (the shading differs, for example at the cockpit > section).
Are you using ac3d or blender? In ac3d I could explain how to fix the problems. Basically the black tail has a screwed up normal. Normals get screwed up in ac3d if the vertices that are used to calculate them are in the wrong order and for some reason it can be difficult to undo the problem. It must be possible for the vertices to be evaluated in a counter clockwise order around a center in order for a normal to be generated. A couple things can make that difficult or impossible. To fix it, look for and eliminate duplicate vertices, especially ones that are creating a very subtle misordering. Also avoid concave edges on surfaces. Certain ones can cause this exact problem, and any of them can create rendering issues on certain video cards. Break them up into multiple surfaces. The shading issue you are describing can be fixed by merging the differing components into a single object. In other words if you merge the nose with the fuselage then the problem will go away. Note that in ac3d this occaisionally won't be apparent until you reload the model. Also note that in some cases you will want to do the opposite, split things into two objects so that you get good sharp edge shading. The 747 has the same problem, and I'm just waiting until I get a chance to return to the texturing. Basically it was a choice between texture detail and weird shading because of the size of it. I'll probably experiment with a different approach on that one. Best, Jim _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
