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Re: [Virtools] alpha 's and chipsets

well it lookes fine on nvidia cards,, with scr alpha or inv src alpha etc etc.
but on the g400 matrox cards, the sorting doesn;t go wrong, but the alphas invert depending on the distance,, very weird , so they may seem alright nearby but when you zoom out the go inverted.. or the other way around, i can't find logic to this.
 
maybe i used the wrong blend modes . modulate alpha also doens't always give the desired effect and sometimes using modulate with source alpha  works fine,  it occus mostly in a scene with many alpha's like a forest..
 
also just setting the blend value to 254 or lower seem to help also..
 
so there, i find it very strange as well.
 
regards
 
tomas sala
----- Original Message -----
From: Nawashi
To: tomas sala ; virtools-user-group@lists.theswapmeet.com
Sent: Sunday, March 18, 2001 10:01 PM
Subject: Re: [Virtools] alpha 's and chipsets

strange .....
when you say it does not work what do you meann ?? wrong object display sorting ???
the blend mode for alpha is modulate alpha, src alpha, inv src alpha
should work evrywhere except on the CRAPPY ATI rage pro ......
 
 
----- Original Message -----
From: tomas sala
To: virtools-user-group@lists.theswapmeet.com
Sent: Sunday, March 11, 2001 3:21 PM
Subject: [Virtools] alpha 's and chipsets

 Hi everyone,
 
I've noticed tht the nemo player handles alpha blend modes differently on various chipsets.
especially when there are multiple materials with alpha blends in a scene.
 
the problem occurs on matrox 3d cards, and 3dfx based cards,
since where developing on nvidia chipsets its not always imediatly clear if an alpha is gonna work on a different machine.
 
has anybody got experience with this., i can't seem to find a proper mode which works on different cards.
but the matrox and 3dfx cards seem to have the same way of handling alpha's could that be correct..
 
regards
 
tomas sala
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