Why such little drop in performance in X800 when AF applied?

Right, Trilinear Optimisations enabled by default. Texture stage optimisations disabled by default.

The AF opts make a big deal, Trilinear opts as well

 

just find it an interesting revelation. Nvidia has an option called "Application Preference" which will do Application Handled AF if you would rather the game handle the way AF is done.

I'm actually just trying to learn something from the way different things are done. You can control texture stage optimisations if you'd like with Nvidias Advanced Control panel tabs and turn them on.

 

what kind of stage opt. do they exactly?

 

Second I'll show you.

 

Ok Sorry about the repost.

With AF opts enabled.

Texture Stage Zero looks like this.





With AF opts on Texture Stage 1-7 Looks like this.






With AF opts off, Texture Stage 0 looks like this.






With AF opts off, texture Stage 1-7 looks like this.








Hope this helps some..


Chris

 

yes thanks

 

ChrisRay,

You screenshots show that 'AF Optimations' look like they are 'Stage Optimisations'.

AF Opt ON = Trilinear (Stage 0) Bilinear (Stages 1-7).

AF Opt OFF = Trilinear (0 - 7).

 

Yup, I thought I pointed out that AF opts were texture stage optimisations earlier 8)

I was just labeling them the way Nvidia labels it AF opts.

 

has sombody found a way to disable the angle dependencie yet , with rivatuner perhaps?

 

Sorry for the basic question, but what are these 'stages' actually?

 

I think you mean Brilinear instead of Trilinear, but as I think was pointed out above, that may be considered a slightly different 'optimization.'

E

 

Yes Unless trilinear opts are turned off, Brilinear occurs on stage 0-7 if texture stage opts are turned off.

And with Trilinear Opts and AF opts, Trilinear occurs on texture stage 0-7.

Texture Stage optimizations are whole different issue.

 

For stages, one can read "layers". Fixed function allows up to 8 texture stages per pass; stage 0 is the the first.

 

the stage (or texture layer) optimization relies on the concept that in typical cases only the base texture really benefits from full tri af filtering.

 

Using control panel af you can never get anything better than bilinear on texture stages 1-7 regardless of what the application requests, try that af tool with control panel af, it requests trilinear on stages 1-7...

Only in application preference af can you get brilinear/trilinear on these stages.

The hidden af mode in the registry which can be unlocked with rtool/radlinker forces af but with the level of filtering i.e. bilinear/trilinear decided by the programs.

Nvidias texture stage optimizations work the same way except there is an option in the control panel option to disable them rather than having to use 3rd party software/dive into the registry

 

Apparently as of 3.7 this is no longer the case:

http://www.beyond3d.com/forum/viewtopic.php?t=13911

 

Here is an interesting potential test to add to the arsenal.

I've been digging around glade wrappers recently (OpenGlide mucks up carmageddon 2's menu's) and came across this one:
http://home.t-online.de/home/zsack/glide_wrapper/index.html

the following is a quote from its documentation
http://home.t-online.de/home/zsack/glide_wrapper/readme.htm

 

This could be happening on ATI drivers if the application does not specify both mag and min filters to be anisotropic. Nvidia hardware does not have a separate controls for mag and min for aniso.

This is a well known issue. Hope the glidwrapper folks are reading this

 

@ChrisRay

Could you please make a screenshot of the default triliner/brilinear filtering(no af) of the nv40 with this little program herehttp://www.lexicon.net/mccann/Trilines.zip

thanks

 

Really? And here I've always been forcing AF thru control panel.

Where exactly is the option in Radlinker to force it on all levels...is that just setting the AF slider to "forced" and "highest quality"? (I'm utterly in love with Radlinker lately, WAY TOO COOL! 8) )