Ansel and Simultaneous Multi-Projection - Two new exciting techs

[andybird123]

Here is Nvidia explaining it:

https://developer.nvidia.com/sites/...works/vr/GameWorks_VR_2015_Final_handouts.pdf



Remember,this is only for VR headsets,and is taking advantage of the fact our periphery vision is not as good.

Its got nothing to do with our peripheral vision not being as good - thats foveated rendering which is different.

Imagine you want to take a flat piece of paper and make a dome shape from it, you would have to cut big chunks out of it, those chunks are completely wasted, they are not used at all. In VR, the GPU has to render the entire flat piece of paper at a higher resolution than the final "dome" and then lots of pixels are wasted, they arent down sampled like in antialiasing, they are completely cut from the final image.

Multiprojection (incorporating mulit resolution rendering) allows you to pre-distort the image so that some of those lost pixels are never rendered in the first place. The render target for the Oculus Rift is something like 2880x1550, about 1.6-1.7 times the number of pixels the actual displays have. Using this it can be cut down to about 1.25 times. Saving you about 30% performance cost.

Multiprojection also allows you to render both eyes simultaneously instead of rendering each eye sequentially and then stitchibg them together, which acounts for the other 20% they showed on stage.

 

[NirK]

Will that on a normal monitor? Or on a normal monitor at all?

Just thinking it might be good with ultrawide, where you mostly look at the middle, if the edges were a bit worse but you got better performance, eg. the 2560x1440 in the middle is full, but the sides are lower to get some more performance.

 

[andybird123]

Will that on a normal monitor? Or on a normal monitor at all?

Just thinking it might be good with ultrawide, where you mostly look at the middle, if the edges were a bit worse but you got better performance, eg. the 2560x1440 in the middle is full, but the sides are lower to get some more performance.

Yes, it can also be used on a normal flat monitor - obduction will have this feature in their game as an option

 

[Razor Time]

I am liking the sound of Ansel, what an excellent idea.

 

[NirK]

Yes, it can also be used on a normal flat monitor - obduction will have this feature in their game as an option

Will it work on maxwell or is it pascal only.

 

[andybird123]

Will it work on maxwell or is it pascal only.

Maxwell supports multi resolution rendering, e.g. the VR bit, but from what they said it looks like simultaneous multi projection is Pascal only

 

[arc@css]

I am liking the sound of Ansel, what an excellent idea.

+1

 

[DmitryD]

Ansel sounds like those Asus wallhack drivers.

+1

That's how I felt...

 

[Gerard]

Ansel seems to be more of a "bullshot" utility, being able to plonk the camera where you want, add effects, scale the res way up. Pretty much what game devs do with screenshots for their games, then the question is asked "why does it not look like this" after it releases. You could do the same thing in the original crysis with console commands, you could render the game at ridiculous resolutions for screenshots.

 

[tarsius]

Any news on the matter? What are the best modern practices to project 3d world onto a single/multiple flat/curved display(s)?