Angus Dorbie (dorbie++at++multipass.asd.sgi.com)
Tue, 3 Jun 1997 10:54:37 -0700
I thought the occulting problem on pfLayers was fixed with a performer
eoe patch.
Are you using the latest?
Cheers,Angus.
On Jun 3, 11:35am, Julia Ellery wrote:
> Subject: Re: Flickerkilling on RE2
> Hello
>
> I thought you might like to know you are not alone in trying to
> overcome this problem! I too received the "usual" comments about
> changing the near clipping plane, which of course is not much
> help since in many applications you need a reasonably close
> near clip AND other things such as fog get affected if you
> start changing such values.
>
> Anyway, this may be of some help:
>
> The default mode for pfLayer is "FAST". This results in the flickering
> problems you describe. It ALWAYS will! The alternative is to change
> the mode for pfLayer to "HIGH QUALITY". I believe this can be
> done by a special MultiGen call before the call to pfLoadFile,
> or directly in the MultiGen code for their loader, if you are in
> the habit of changing this.
>
> This "HIGH_QUALITY" uses stencil planes and this CURES the flickering
> problem: Hurrah...... BUT unfortunately we have come across side
> affects. I'll describe these affects here in case you come across
> them but they might be related to the hardware we are using
> (High Impacts) and of course, the endless list of patches...
>
> Side affect: With "HIGH QUALITY" we have occulting problems on and
> around the surfaces concerned.
> There was debate at one time about this being related to
> transparent surfaces only but this is looking unlikely.
>
> So currently, I have the unsatisfactory situation of 2 versions of
> the loader and the modellers have the choice of a
> flickering problem or occulting problem! Most choose the one that
> cures the flicker but racetrack databases use the other!
>
> Hope this is of some help, or at least confirmation that you
> are NOT imagining the problem (which sadly seems to be what some
> would try to make you believe).
>
> Good luck.
>
> Julia Ellery,
> Senior Visual Software Engineer,
> Intersim Limited, Units 7-8, Thorgate Road, Littlehampton. Sussex. UK
> Tel: +44 (0)1903 733428
> Fax: +44 (0)1903 730246
> email: modellers++at++intersim.co.uk
>
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>-- End of excerpt from Julia Ellery
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