OpenGL options questions

[katZune]

hello, recently i was toying with few options but i dont figure what does or change few options, so actually i'm asking here (i didn't find any answer for those)

1.-What does Shaders ?
i know that shaders for texture warp and brightness do but what about the rest? if you guys can explain me with pics that would be nice (or a wad)

2.- Which is the best for performance (texture filter): none (mipmapped) or trilinear? since i'm using High resolutions textures i have that doubt

3.- Precache textures is recommend? (read up ^) tbh i dont know if it is good or bad

4.-What does gl_vid_allowsoftware

5.-What does gl_vid_multisample

Actually this is more for about performance and if it make any change in the look of the game (or in certain things)

[Ænima]

1.-What does Shaders ?
i know that shaders for texture warp and brightness do but what about the rest? if you guys can explain me with pics that would be nice (or a wad)

http://en.wikipedia.org/wiki/Shader

http://forum.zdoom.org/viewtopic.php?f=3&t=28139

Most shaders smooth things out or add some sort of shading (hurr :p).

2.- Which is the best for performance (texture filter): none (mipmapped) or trilinear? since i'm using High resolutions textures i have that doubt

Mipmapped is fastest, trilinear is smoothest. Although TBH i don't use it because it just makes everything look blurry to me and it reminds me of JDoom.

3.- Precache textures is recommend? (read up ^) tbh i dont know if it is good or bad

It depends. It really only matters if you're playing a mod that has hires textures or sprites. If you turn precaching on, all textures will be loaded on the client when the map loads. This can add a lot to map load times, depending on how slow your machine is. If you leave precaching off, the default behavior is to load a texture or sprite as soon as you look at it for the first time.

4.-What does gl_vid_allowsoftware

5.-What does gl_vid_multisample

No idea about those.

[Cruduxy]

Multisample is for full screen anti-aliasing I think.. makes polygons -maybe the walls textures- smoother.

btw do people use ambient light? Can almost swear its like cheating and should be disabled or at least have something to stop it from being used in some wads -without ACS festing the hell out of the wad-

[Ænima]

btw do people use ambient light? Can almost swear its like cheating and should be disabled or at least have something to stop it from being used in some wads -without ACS festing the hell out of the wad-

I use the ambient light setting kinda like gamma correction (sometimes things appear really dark on my monitor). But I agree that it's cheap and can be exploited a lot. A few years ago, it was common for GvH players to turn their distance fog off and max out their ambient light setting.

[katZune]

Welp i have fog off in few maps because its pretty hard to see (blud factory, GvH) anyway Thanks Ænima and cruduxy but i think multisample is something more...

anyway it seem that fog shader make sprites/textures/model look weird when you are close...



Shader for fog off:


Shader for fog on:

[-Jes-]

Welcome to old news Katzune.

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[katZune]

Haha true, But i'm going to disable it since only add that annoying thing