Demo on Outdoor scattered light.

[LittlePenny]

In the August issue of Game Developer Magazine they had a nice article about Scattered light. The physics they used to implement this was kindof roundabout, but I was wondering if a few of you with DX8 capable cards could give me your thoughts on the demo?

http://www.gdmag.com/code.htm It is the aug02.zip.

I was wondering what kind of performance it would get and if it could be coupled with pvrdev's demo on shadows from an infinite light source.

Anyhow, thanks.

 

[demalion]

Looks beautiful, and very smooth.

It is locked at about 40 fps according to fraps 1.8A. My screen is at 1280x1024x32@85Hz and the applicable draw space in the window looks like about 960x480 or something (too lazy to get a pixel position reporting tool at the moment). Note that using Alt+Enter to go to full screen resulted in a banded, distorted image that looks like a partial section of what I saw in windowed mode, and the fraps reading dropped to 30, so it doesn't seem to be working properly for me.

I would be very pleased with a game with graphics like that...looks MUCH better than any flight simulator I've seen, even with a farily blocky terrain (the lighting effects help disguise the blockiness even fairly close up), though things like nice looking water and building/vehicle shadows would likely be a fair additional performance load on the GPU.

I think Morrowind may use some similar principles in its graphics, so I guess pixel shaders aren't just limited to the water in that game...but that is just a layman's guess.

 

[Mummy]

The sun "glow" in Morrowind doesnt need PS as it works without them enabled as well.

Only water is using PS (sigh).

 

[BoardBonobo]

I agree, it looks pretty good. The framerate was locked at 34fps for me both at full screen (640x480) and in a window. I would guess it CPU limited as alot of the calculations would have to be done off card. I think the banding results from it using a 16bit display.

The way the cloud reflections move across the scenery is v.realistic. Neat!

 

[SlmDnk]

Very beautiful and realistic demo. I had the same problems in full-screen as you ppl. Hope to see this used in games soon...

 

[OpenGL guy]

I haven't checked out the above-mentioned demo yet, but have you seen this one?
http://www.ati.com/developer/gdc/GDC02_HoffmanPreetham.pdf

Runs great on my 8500.

 

[LittlePenny]

I haven't checked out the above-mentioned demo yet, but have you seen this one?
http://www.ati.com/developer/gdc/GDC02_HoffmanPreetham.pdf

Runs great on my 8500.

Same people, so I would assume this demo is the same. To be fair I think your PDF was published before I found that article . I will have to make a trip to campus before attempting to download that 60+ PDF. Thanks for sharing though, I am sure this 60+ pager will be more fulfilling than the 4 page article.

 

[OpenGL guy]

Same people, so I would assume this demo is the same. To be fair I think your PDF was published before I found that article . I will have to make a trip to campus before attempting to download that 60+ PDF. Thanks for sharing though, I am sure this 60+ pager will be more fulfilling than the 4 page article.

Yeah, I think the link I gave is to the .pdf used at the GDC presentation a couple months back. When I saw the demo running in-house, I was quite impressed

 

[Dave B(TotalVR)]

GROAN, all these ppl running DX 8 demos ;(

Come on PowerVR come out with a DX 8 CARD!!!