Vavoom Skyboxes

CtrlKeyEmAll · January 10th, 2005, 08:54 PM

Is there a fix for this?

EDIT: I know that Vavoom has trouble with skyboxes but the screenshot shows a Vavoom specific addon with it's own skybox and as you can see it looks great. So why do the darn lines still show?

janka · January 12th, 2005, 11:38 PM

It works fine for me.

What video card do you have?

Tiealk · January 13th, 2005, 07:08 AM

This looks like the textures are not properly clamped to their edges. This happens if a program was developed with older NVidia drivers which didn't do this properly.
In newer NVidia drivers there is an option to restore the old incorrect behavior but if this is what I suspect it should be fixed in the code.

CtrlKeyEmAll · January 13th, 2005, 08:18 AM

@janka: You don't see the lines when you play Silent Steel or just regular Doom without the addon? I got an nVidia GeForce FX 5200.

@Tiealk: Ya but I don't see the lines when playing just Doom 2 without an addon loaded, they are there but harder to see.

EDIT: Actually I should correct myself, the new Vavoom v1.16 works much better on skyboxes when playing just Doom 2 without an addon and you can't see the lines. Only when you look straight up you can see the sky coming together at the top like the inside of a pyramid or something. Like I said when I play Silent Steel the sky is included in the download and it looks great but then I see the lines.

janka · January 16th, 2005, 11:51 PM

Quote:

Originally Posted by Tiealk

This looks like the textures are not properly clamped to their edges. This happens if a program was developed with older NVidia drivers which didn't do this properly.
In newer NVidia drivers there is an option to restore the old incorrect behavior but if this is what I suspect it should be fixed in the code.

Basicly it looks like it's performing clamping to border which is strange since it border is disabled. So if driver is clamping against border with border disabled, it's a driver bug because this is against OpenGL specification.

Tiealk · January 17th, 2005, 09:00 AM

Quote:

Originally Posted by janka

Basicly it looks like it's performing clamping to border which is strange since it border is disabled. So if driver is clamping against border with border disabled, it's a driver bug because this is against OpenGL specification.

No, it isn't. I had the same problem once and was told on the OpenGL forum that GL_CLAMP is really supposed to clamp to the border. To avoid this you have to use GL_CLAMP_TO_EDGE instead. Older NVidia drivers got this wrong and that's probably the reason for this misconception.

janka · January 17th, 2005, 10:16 AM

Right it's GL_SGIS_texture_edge_clamp extension that has been added to core specification in version 1.2.

BTW @CtrlKeyEmAll, do you have the same problem with Direct3D renderer?

CtrlKeyEmAll · January 18th, 2005, 11:10 AM

Ya lol thanks, that seems to do the trick.

January 10th, 2005, 08:54 PM	#1
CtrlKeyEmAll Commander Keen Join Date: Mar 2004 Posts: 181	Vavoom Skyboxes Is there a fix for this? EDIT: I know that Vavoom has trouble with skyboxes but the screenshot shows a Vavoom specific addon with it's own skybox and as you can see it looks great. So why do the darn lines still show? Last edited by CtrlKeyEmAll; January 12th, 2005 at 10:16 AM.

January 13th, 2005, 08:18 AM	#4
CtrlKeyEmAll Commander Keen Join Date: Mar 2004 Posts: 181	@janka: You don't see the lines when you play Silent Steel or just regular Doom without the addon? I got an nVidia GeForce FX 5200. @Tiealk: Ya but I don't see the lines when playing just Doom 2 without an addon loaded, they are there but harder to see. EDIT: Actually I should correct myself, the new Vavoom v1.16 works much better on skyboxes when playing just Doom 2 without an addon and you can't see the lines. Only when you look straight up you can see the sky coming together at the top like the inside of a pyramid or something. Like I said when I play Silent Steel the sky is included in the download and it looks great but then I see the lines. Last edited by CtrlKeyEmAll; January 13th, 2005 at 08:35 AM.

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January 12th, 2005, 11:38 PM	#2
janka Commander Keen Join Date: Sep 2004 Posts: 9	It works fine for me. What video card do you have?

January 13th, 2005, 07:08 AM	#3
Tiealk Commander Keen Join Date: Sep 2004 Posts: 42	This looks like the textures are not properly clamped to their edges. This happens if a program was developed with older NVidia drivers which didn't do this properly. In newer NVidia drivers there is an option to restore the old incorrect behavior but if this is what I suspect it should be fixed in the code.

January 17th, 2005, 10:16 AM	#7
janka Commander Keen Join Date: Sep 2004 Posts: 9	Right it's GL_SGIS_texture_edge_clamp extension that has been added to core specification in version 1.2. BTW @CtrlKeyEmAll, do you have the same problem with Direct3D renderer?

January 18th, 2005, 11:10 AM	#8
CtrlKeyEmAll Commander Keen Join Date: Mar 2004 Posts: 181	Ya lol thanks, that seems to do the trick.

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