Alpha Multipass in Pete's OGL Driver

bobotns · June 24th, 2001

This is a message for Pete!
Pete, is there a way to let the alpha multipass function in your OpenGL driver work like the one for D3D? I don't like the big black triangles that appear with some objects on the screen. (GT2: tachometer; Dragon Ball Final Bout: the town wallpaper;...)

NB: I'm using the OGL driver because it's faster with my video card.

**Pete Bernert** · June 25th, 2001

Sure it is possible... as a matter of fact, it already does the AM job exactly like
the D3D ones

If you get different results, well, blame ATI

**lu_zero** · June 25th, 2001

ATI....

hmmmm

chp · June 25th, 2001

I own an ATI AIW Radeon and an AIW 128 pro (GL) and I never seen this glitches. Wich drivers do you use?

glide4ever · June 25th, 2001

Quote:

I don't like the big black triangles that appear with some objects on the screen. (GT2: tachometer; Dragon Ball Final Bout: the town wallpaper;...)

In Pete's OpenGL, this problem usually passes in color depth of 16 bit, not in 32 bit

This problem doesn't pass with the plugin d3d in 16bit, but OpenGL is the best

Anyway, who wants to play in color depht of 16bit these days?

Plugin: Pete's OpenGL Driver 1.1.50
Author: Pete Bernert

Resolution/Color:
- 800x600 Fullscreen - Desktop changing [32 Bit]

Textures:
- R8G8A8A8
- Filtering: 2 - edge clamping supported
- Caching: 2 - 128 textures usable

Framerate:
- FPS limit: on
- Frame skipping: off
- FPS limit: Auto

Compatibility:
- Offscreen drawing: 4
- Framebuffer texture: 1
- Alpha multipass: on
- Mask bit: off
- Advanced blending: on (hardware)

Misc:
- Scanlines: off
- Line mode: off
- Unfiltered FB: off
- Dithering: off
- Full vram: off
- Game fixes: off [00000000]

bobotns · June 25th, 2001

I'm using driver 4.13.7078.
I can't play in 32 bit because it will not be fast with my card, even in 640x480!

glide4ever · June 25th, 2001

Quote:

I'm using driver 4.13.7078.
I can't play in 32 bit because it will not be fast with my card, even in 640x480!

When I change to color depth of 16bit, the difference in the speed is very small, and only some games are benefitted for this reason (Parasite Eve 2 for example) in these games, I win at least 7 or 10fps more in color depth of 16bit, the difference of quality between 16bit and 32bit, in many aspects, is very remarkable, so I always play in color depth of 32bit

bobotns · June 27th, 2001

I know now why it is so!
Certain combinations of texture settings, alpha multipass and filtering give sometimes bad results.
I'm using 4444 textures now (was 5551) and I don't have the problem anymore (that's why pete says: bad transparency, I understand now!).
Depending on the game, one can use standard or extended filtering to remove the last glitches!

June 24th, 2001	#1 (permalink)
bobotns Registered User Join Date: Apr 2001 Location: Germany Posts: 179	Alpha Multipass in Pete's OGL Driver This is a message for Pete! Pete, is there a way to let the alpha multipass function in your OpenGL driver work like the one for D3D? I don't like the big black triangles that appear with some objects on the screen. (GT2: tachometer; Dragon Ball Final Bout: the town wallpaper;...) NB: I'm using the OGL driver because it's faster with my video card. __________________ pIII 667MHz - 128MB - ATi RAGE 128 32MB - Win98SE

June 25th, 2001	#3 (permalink)
lu_zero Moderator Join Date: Apr 2001 Location: Earth,Europe,Italy,Turin Posts: 292	ATI.... hmmmm __________________ lu_zero FPSE Former Team Member P.E.Op.S member GPSE Project starter

June 25th, 2001	#4 (permalink)
chp Bip...Bip... Join Date: Apr 2001 Location: on Earth Posts: 966	I own an ATI AIW Radeon and an AIW 128 pro (GL) and I never seen this glitches. Wich drivers do you use? __________________ If god doesn't exist in our world, then...I will create god with my own hands!

June 27th, 2001	#8 (permalink)
bobotns Registered User Join Date: Apr 2001 Location: Germany Posts: 179	I know now why it is so! Certain combinations of texture settings, alpha multipass and filtering give sometimes bad results. I'm using 4444 textures now (was 5551) and I don't have the problem anymore (that's why pete says: bad transparency, I understand now!). Depending on the game, one can use standard or extended filtering to remove the last glitches! __________________ pIII 667MHz - 128MB - ATi RAGE 128 32MB - Win98SE

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June 25th, 2001	#2 (permalink)
Pete Bernert FREAK Join Date: Apr 2001 Location: Germany Posts: 874	Sure it is possible... as a matter of fact, it already does the AM job exactly like the D3D ones If you get different results, well, blame ATI

June 25th, 2001	#6 (permalink)
bobotns Registered User Join Date: Apr 2001 Location: Germany Posts: 179	I'm using driver 4.13.7078. I can't play in 32 bit because it will not be fast with my card, even in 640x480!