ATI Crossfire文档提供的NVIDIA FSAA样本存疑

IQ博士

下图是Hothardware抓的NVIDIA卡实际截图：

IQ博士

hothardware初始时候的原文：

In the scenes above we are pointed to a two areas of interest.  Obviously the edge pixels, in the hotel sign, are smoother in the ATi provided shot but there is another benefit that may be more subtle but obvious once you know to look for it.  Your eyes have probably been getting used to the less detailed renderings of Multi-Sample AA with "micro-geometry" details.  If you take a close look at the telephone wires and the antennas on the roof-tops above you'll notice that the ATi 14X AA shots look more detailed and render-accurate as compared to the standard 8X AA shot.  This is impressive for sure but we'll have to see the results for ourselves in across a myriad of gaming conditions before we can make any conclusive statements here.  One area of concern would be 14X AA performance in more graphically challenging game titles like Doom 3, Far Cry or Splinter Cell Chaos Theory.  We shall see for ourselves soon enough.

hothardware自己抓图后，发表的更新：

We tried to duplicate the screen shots that ATI supplied to us, and found that ATI seems to have misrepresented the micro-geometry detail of NVIDIA's 8X anti-aliasing method. The screen shots we took on our own with a GeForce 6800 GT, clearly show more detail than the screen shots distributed by ATI in their CrossFire presentation.  

We wandered around the same portion of the map ATI used for their screen shots at various resolutions with a GeForce 6800 GT installed into our test system and HL2 configured for high detail, and could not replicate ATI's screen shots.  Even at lower resolutions, the same portions of the antenna atop the hotel shown in the CrossFire 14X AA screen shot are visible on the GeForce. And with the resolution turned up to 1600x1200, the detail only got better. We even tried to move towards and away from the hotel from different angles and couldn't get the portions or the antennas missing in ATI's screen shots to disappear.  So, while ATI's new 14X AA method enabled by CrossFire may provide more micro-detail than other AA methods that use fewer samples, which seems evident in the edge details on the hotel sign, the difference between NVIDIA's 8X AA and CrossFire's 14X AA as demonstrated by ATI don't seem to be indicative of actual in-game images when comparable detail settings are used.

ATI的回应：

Finally, we contacted ATi for comment on this issue that we discovered and they agreed they too could not reproduce the lack of detail that is represented in the NVIDIA screen shot they provided us above, although they assured there was no intention of misleading us with these competitive image quality comparisons.  This isn't the first and probably won't be the last time we will be witness to over-zealous marketing efforts, whether accdidental or intentional. Regardless, we hope to be able to filter through this sort of thing for you, the reader, as we have here, in the future.

长风

:funk: 快3年了，图还在的话，可就太难得了。

predacon

:funk: 挖到化石了！

Robin_Zhang

……果然挖坟高手……

faforever

they agreed they too could not reproduce the lack of detail that is represented in the NVIDIA screen shot they provided us above

又一个ati公司无耻的明证，自己把证据“做”出来。
某些afan有走这条路的倾向了

Isrufile

不知道3年前的帖子怎么挖到的

2ndWeapon

晕~见到木乃伊了:funk:

IQ博士

下图是ATI官方提供的CF文档图片：