Grass and Shaders

[Arkon11]

Well, I'm working on an un-anouced map, I found this neat grass shader in a bushido map pack for JO.

 

-----------------------------------------

textures/f0x0r/japanvertgrass01

{

qer_editorimage textures/f0x0r/japanvertgrass01

{

map textures/f0x0r/japanvertgrass01

}

{

map $lightmap

blendfunc filter

rgbgen identity

}

{

map textures/f0x0r/ss_grassjapan

surfaceSprites vertical 5 20 25 2000

ssVariance 1 2

ssWind 4.0

alphaFunc GE192

blendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA

depthWrite

rgbGen vertex

}

}

-----------------------------------

 

It's pretty decent, and with a little tweaking it will suit my needs (if i get permission to use it that is). But I am having trouble. to use this shader, you have to lay down this grass shader/texture. Which is visable and solid. Then the grass sprites appear on that. I want it so I can lay down something that is invisible and not solid. Kinda like nodraw. I don't have any idea what to do. Any suggestions.

 

 

 

Oh and I just did this---

 

 

Well, I made a few changes, ignore the file names and stuff.

 

------------------------------

textures/grass/floor

{

qer_editorimage textures/grass/floor

surfaceparm nomarks

surfaceparm nodraw

surfaceparm nonsolid

surfaceparm nonopaque

surfaceparm trans

q3map_nolightmap

 

{

map $lightmap

blendfunc filter

rgbgen identity

}

{

map textures/f0x0r/ss_grassjapan

surfaceSprites vertical 5 20 25 2000

ssVariance 1

ssWind 0.0

alphaFunc GE192

blendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA

depthWrite

rgbGen vertex

}

}

 

-----------------------

 

I thought that would make the ground texture invisble.(the nodraw part) But it made everything invisable so it seems. I still need some help.

[lauser]

Okay is this for M/P? If it is and you use grass_sprites all over, don't expect great framerates. Sprites lag maps.

[wedge2211]

Get rid of surfaceparm nodraw. This section:

 

Originally posted by Arkon11

{

map textures/f0x0r/ss_grassjapan

surfaceSprites vertical 5 20 25 2000

ssVariance 1

ssWind 0.0

alphaFunc GE192

blendFunc GL_SRC_ALPHA GL_ONE_MINUS_SRC_ALPHA

depthWrite

rgbGen vertex

}

 

Is what maps a texture to the surface. (See the "map textures/..." line?) Try making yourself a jpeg that's all black and replacing the stage I highlighted with:

 

{

map textures/whatever/black

blendfunc add

}

 

Then you should be able to apply the shader to a brush and just get grass sprites sprouting from an invisible surface.