Re: [Flightgear-devel] New Reflection Shader- Very Nice but....

[Heiko S. <aei...@ya...>]

Hi Vivian,
> 

> > 
> > -objects with this shader are emissive when ambient-
> correction set higher
> > than zero.
> 
> That is indeed a bug. I have a fix, but I'm having
> difficulty in balancing
> out the blue in the ambient light. Hopefully I can upload
> it soon.

> Bugfix in cvs. The colour and light balance isn't exactly the same as
>before, so you might need to fix up your offsets.

Thanks, works so far as I can see!
> > 
> > -fresneliness seems not to work- when setting
> less/equal than 1 I can see
> > the fresnelookup.png on the object
> 
> Er - yes - that's what the fresnel effect is meant to do,
> but fresneliness =
> 0 should turn it off. Seem to do what it says on the tin
> here.

Oh- o.k. Maybe you should name it a bit different. Under fresneliness I did understand the fresnel effect. I thought the FresnelLookupMap was to help to set the fresnel-effect. So I was mistaken ;-) 
> 
> > 
> > -the same with rainbowiness, but I guess here it is
> whished (Nice for
> > cockpit windows on airliners! )
> 
> Yes - should have a little for aluminium, some more for
> glass. Rainbowiness
> = 0 turns it off

Yep, would look great on our airliners!
> 

> > It is right, that refl_correction set to 1 makes the
> whole object totally
> > reflective (without using the reflectionmap), while
> setting to -1
> > nonreflective?
> > And all values less than 1 seems to use the map
> again?
> 
> Yes - refl_correction simply adds or subtracts from the
> overall
> reflectiveness. You can saturate the map. Solution - don't
> do it :-)

I played a bit with it yesterday- I understand the use of it now much better. Very nice that we have different ways to controll the effect.
> 
> > 
> > Would it be hard, if the alpha channel of the map will
> be included in the
> > base color map instead an extra file, to make use of
> it instead?
> > (Would make Livery-select much more interesting)
> > 
> 
> Possible to do, but then you couldn't use transparency in
> the texture is you
> wanted to. At least that is my understanding. I think the
> correct solution
> is to use a property to set the map path - on my todo
> list.

Wow- that would sound great!
> 
> 

> Pretty impressive screenshots, btw.

Pretty impressive shader, I would say!
I have updated the upcoming Newsletter, feel free to add or delete things I've written about.

Heiko

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