Roy Vegard Ovesen said:

> Frederic's solution to change the order using select animation in the xml file 
> worked great. I also think that that was by far the most attractive solution 
> too. Thanks Fred. I suspect that moving the fuel panel all the way to the 
> bottom of the of the AC model file would not have worked. When including the 
> fuel level gauge as another AC model, it would be placed below everything 
> else anyway, right?
> 

Fred's solution is a good one.  I'm curious now about the piper's config.
Anyway, moving the fuel panel down the end puts it higher in the stack.  That
is what you want.  Transparent objects won't be blended with colors "behind"
unless they are known,  so what you are striving for is getting the
transparencies on the stack last or at least on top of anything that might
show up "behind" in the view.  If something goes on the stack after the fuel
panel then there will be a problem.  I can't remember but this probably
contradicts my earlier statement.  It can be difficult to remember...but
basically this is the rule: 

Last thing loaded onto to the stack is first thing processed during rendering.
 And you want transparencies processed earlier than stuff behind them.

> >
> > If none of this helps, then send your models and configs and I'll take a
> > look. That wouldn't be until Sunday night at the earliest, because of a
> > trip down to Portland.
> >
> > FWIW when modeling flat panels with bezeled guages I'm not sure there is
> > any advantage to using this method unless there's something specific being
> > modeled below the panel surface (e.g. certain mag compasses).  For example
> > on the p51d and the cub it isn't all that obvious that the faces aren't
> > below the surface. On the other hand you may need this method for that side
> > fuel panel, because it is so close...not sure.  I guess I would always try
> > it without the transparency to see what looks like first.  Keep in mind
> > that there is a performance cost to rendering things through a
> > transparency.
> 
> Is there perhaps a difference when using a perfectly transparent er... 
> transparency and a semi-transparent transparency, performance wise?!

It seems like there should be, but not from my experience.

Best,

Jim


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