ChrisW said:
If you get the same image quality from this optimization and full trilinear then why would you want ATI to waste precious cpu cycles on full trilinear? Why should these games be benchmarked again just to show slower results? Do you think people are going to want to disable this feature when they play games for no other reason then to slow down the card?
Bolding mine.
With their behavior for "developer specified" mip maps (a case where literal and mathematical trilinear filtering seems necessary and useful, and seemingly allowing the other behavior to be judged by the criteria of image quality alone), I think this statement and sentiment is quite accurate. But do we have the same minimum image quality the rest of the time?
I think this is a possibility as far as ATI personnel: that they might indeed have information and analysis of this X800 methodology that could prove the bolded statement true in every case.
Consumers don't have that information, though The most they might be able to verify easily is ATI's description of a universal behavior for developer specified mip maps, and therefore being able to evaluate the virtues of when it is deciding when
not to apply the optimized methodology. This might or might not be enough to set them apart from the competition, but doesn't relate to the question of image quality in all cases as ATI proposes for not being able to turn it off, only some cases.
...
I think protecting the methodology might be a valid reason not to specify this information in exact detail, but that helps ATI's situation, not that of consumers. There isn't something necessarily wrong with ATI looking out for themselves, but good marketing is about keeping consumers accurately informed about beneficial aspects of your product while doing just that, and there is a marked absence of that in relation to this issue. It might be true that they are not cheating, but it is certainly true that they haven't done much to explain
why that is the case.
It might be difficult to do so without divulging some sort of intellectual property, but it is people within ATI, not outside, who have familiarity with the methodology and the most information/control on how to:
- demonstrate its image quality equivalence
- come up with an explanation or a testable aspect of its behavior that protects the overall methodology while making it easier for independent verification
- provide the consumer with tools to control it until that happens
There might be nothing lacking in the methodology, but currently only people within ATI know that with any general applicability. This is not the best case for ATI or consumers...it seems to me ATI should work towards one of the available ways of improving the situation.