it forces bilinear interpolation. Duh!!

It is so hard to get mad at you when you have the twins "quadruplets" bouncing at me. Looks for drooling smiley to attach.

You can read all about it here.

Simply said: estimating the values of unknown points between 2 known points.

Consider this:

5 . . . . 15

5 and 15 are the known points, we need to estimate the values between those points.

This comes in handy with for example enlarging pictures. If the above numbers were pixel values

With no interpolation we would get
5 5 5 15 15 15 (we just work with known values and spread them out evenly). Resulting in a blocky picture

With bilinear interpolation we get a nice gradient resizing
5 7 9 11 13 15

It's a bit more complex, but that's basically it

See also: http://www.cambridgeincolour.com/tutorials/image-interpolation.htm
->

No interpolation

With interpolation

Found this on the Interwebs
Advanced GPU Settings

Vertical Sync: Sets vertical sync to the refresh rate of the monitor. This should reduce tearing of the image as you drag it. Deselecting this option can speed up interaction at the cost of tearing.

3D Interaction Acceleration: Turns off the 3D Direct to Screen accelerated interaction.

Force Bilinear Interpolation: Forces use of a shader program to guarantee filtering is taking place (Some cards do not support filtering of 16-bit floating point textures as used in the blitpipe. This option forces them to use a shader program.)


I turned it on just for kicks, and my display driver crashed when I was rotating a simple 3D object

That's what I said!

Damn Thanks everyone. I'm clicking it No more blocky pictures.
A week late if I had of know this earlier ReyRey wouldn't have stood a chance
I am just playing for real quit hittin me Rey oww

Hey Jerry!

So you noticed a difference? I myself have been rather happy with the way cs4's new graphics abilities have been working out of the box, so have not attempted clicking that button. It seems you are seeing something "good" occurring? What should I look for once I've clicked that? (I'm on a Mac Intel - so your answer might not work for me, but I'm curious - but not so curious as to change MY OWN graphics settings )

Ah yes, I did read all that when I got CS4. And it seems to make just about as much sense to me now as it did then
But for those of you whole like this sort of thing, here is where Vokaris's link would get you eventually!

Advanced GPU Settings

Vertical Sync: Sets vertical sync to the refresh rate of the monitor. This should reduce tearing of the image as you drag it. Deselecting this option can speed up interaction at the cost of tearing.

3D Interaction Acceleration: Turns off the 3D Direct to Screen accelerated interaction.

Force Bilinear Interpolation: Forces use of a shader program to guarantee filtering is taking place (Some cards do not support filtering of 16-bit floating point textures as used in the blitpipe. This option forces them to use a shader program.)

Advanced Drawing

* Use for Image display: Stores a higher resolution bit depth of images on the GPU and uses shader programs to apply checkerboarding, HDR toning, and color matching to offload computations from the CPU to the GPU.
* Debugging: Compositing: Gamma Corrected: Uses a perceptually correct approach to compositing the image over the checkerboard.
* None: Does not composite the image over the checkerboard (results in black over the translucent areas).
* Linear: Uses a linear blending approach to apply the checkerboard compositing.
* Color Matching: Turns ON or OFF the color matching step (implemented as a shader program on the GPU).

and more here
http://kb2.adobe.com/cps/404/kb404898.html

Q. What are all those Advanced Settings options and what do they mean?
A. Advanced Settings options:

Vertical Sync: Reduces tearing by syncing the frame rate to that of the display.
3D Interaction Acceleration: Increases the clicking speed when working with 3D forms. If you experience drawing problems that correct themselves when you let up on the mouse button, turn this option off.
Force Bilinear Interpolation: Tells the GPU to perform high precision modeling and smoothing functions when you use a card that doesn't support those functions for certain image types.
Advanced Drawing: Allows the GPU to perform, and therefore speed up, certain tasks, such as color matching, depth conversion, HDR tone mapping, and checkerboard compositing.
Use For Image Display: Doubles the use of video RAM used to display the main image when you use multiple images, large images, or large 3D models. It's available only on display cards that have 512 MB RAM or more.
Color matching: Can be used to avoid the display of visual artifacts.
If you have a problem with your display, then you can change one of these options at a time and perform the function that caused the display issue to provide an idea of where the problem lies.

As I said above a lot of the changes are subtle so is this one. Well hell I don't know if CS3 had it or not My computer couldn't do the 3d stuff.
anyway back to what I saw. I just now clicked it I will play with it in more depth later.
I have a good test for it though.
I recently made a design for a vechicle wrap so it had to be blown up quite a bit and the original was to small so I had to hand paint some of the design to keep everything sharp.

I had a little time to play with it so far it is pretty cool I don't know why you would not have it turned on, unless your computer can't handle it.
below is a test, Original wolf pic client gave me had a res of 96 I blew it up to 1000. There is a big difference in the two. I am hoping it helps the little blockage that occurs when you cut stuff out with pen tool like anti-alias on crack.

I'm assuming this is for display purposes on your monitor? In other words, I suspect it isn't altering the actual pixel info in the file, but translating it to a clearer, more organic display on the screen?

I'm a gonna have to check dis out!

Thanks Jerry for that last post!