[Driver issue]ATI Fog problems (formerly: Blinking lights.)

Phoenix · Post by **Phoenix** » Wed Aug 31, 2005 10:39

Radeon 9600XT here, and I can confirm having the same fog problem on LTSD E4M3. didn't notice it while playing Doom 2 levels though, or the couple other wads i played the other day (they didn't have fog)

BetaSword · Post by **BetaSword** » Thu Sep 01, 2005 0:07

Yep, I also get that problem. Radeon X700 for me. Here's some screenshots:

[spoiler]

[/spoiler]

Edit: Oddly enough, switching from OpenGL to Software rendering, and back to OpenGL seems to make the depth fog appear like normal. Odd.

Edit 2: Well, that is, of course, until the dynamic lights come into play again... Which seems to screw with the depthfog quite a lot... Also, walking from a dark sector into a lighter sector seems to mess with the depthfog as well, but that may be on purpose, I don't know.

Post by **Graf Zahl** » Thu Sep 01, 2005 0:41

I created a test version.

Anybody who has problems with this should download

http://grafzahl.drdteam.org/gzdoom/atifogtest.zip

and tell me whether it helps or not.

lemonzest · Post by **lemonzest** » Thu Sep 01, 2005 0:52

having same problem with the depth fog, it seems to be "fighting" with the real fog on the level

I'm using catalyst version 5.8 (latest) on a Radeon X800XT

also using the build you provided here.

@Graf, could you post a picture on your nvidia of how the level should look?

Post by **Graf Zahl** » Thu Sep 01, 2005 1:08

Another test version:

http://grafzahl.drdteam.org/gzdoom/atifogtest2.zip

lemonzest · Post by **lemonzest** » Thu Sep 01, 2005 1:31

from my side, looks like its fixed. will post pics.

[spoiler]

[/spoiler]

Edit:pics posted

Willis · Post by **Willis** » Thu Sep 01, 2005 1:31

I ran around in e4m3 for a while going to spots that caused me trouble before and it worked. I opened doors and looked into fogless sectors from inside a foggy sector and went into buildings and looked outside into the fog. it all seemed to be working correctly.

lights on regular fogless maps however are still blinking, I don't know if this is because you haven't implemented the fix into the lighting code yet or some other reason

NiGHTMARE · Post by **NiGHTMARE** » Thu Sep 01, 2005 1:34

Maybe it's time to dump OpenGL, and switch to Direct3D instead...

Willis · Post by **Willis** » Thu Sep 01, 2005 1:36

maybe its time for ATI to whip into shape and implement better ogl support in their drivers

lemonzest · Post by **lemonzest** » Thu Sep 01, 2005 1:37

hey, lets not start a OpenGL vs Direct3D or ATI vs nVidia Flame war , as it looks like Graf is on the way to fixing it

Willis · Post by **Willis** » Thu Sep 01, 2005 1:40

lemonzest wrote:hey, lets not start a OpenGL vs Direct3D or ATI vs nVidia Flame war , as it looks like Graf is on the way to fixing it

I agree, yay for graf

Post by **Graf Zahl** » Thu Sep 01, 2005 1:40

Willis wrote:I ran around in e4m3 for a while going to spots that caused me trouble before and it worked. I opened doors and looked into fogless sectors from inside a foggy sector and went into buildings and looked outside into the fog. it all seemed to be working correctly.

lights on regular fogless maps however are still blinking, I don't know if this is because you haven't implemented the fix into the lighting code yet or some other reason

All I did was change the fog hint from GL_NICEST to GL_FASTEST. ATi must be insane to default to an unstable mode.

About the blinking, is there any chance that you could make a small movie with a screen capture tool? Maybe I get some ideas when I see the effect in action. Screenshots don't help much.

Post by **Graf Zahl** » Thu Sep 01, 2005 1:41

NiGHTMARE wrote:Maybe it's time to dump OpenGL, and switch to Direct3D instead...

No chance in hell I am going to bother with that mess of an API.

Willis · Post by **Willis** » Thu Sep 01, 2005 1:57

http://rapidshare.de/files/4587775/lights.zip.html

if you have something against rapidshare I can also send it to your email upon request.

also the blinking lights in this version are different than in the reg 0.9.2 version, if you wanted I could also provide a video for 0.9.2 for comparison if need be.

Post by **Graf Zahl** » Thu Sep 01, 2005 2:09

It seems I left some testing code in the last version. Please try this and tell me whether it is working now

http://grafzahl.drdteam.org/gzdoom/atifogtest3.zip