Masking an environment map ?

[AshuraDX]

Hey there everybody , I basically have the following problem :

I got to apply an environment map to parts of a texture

I cant use overlays in this case so is there any way to maks an environment map ?

[mrwonko]

Could you elaborate some more about what your result is supposed to look like? Having an overlay is the simplest way of achieving this, but depending on how this is to be used (e.g. a grate?), depthFunc equal could work as well.

[Pande]

This is something I just recently learned myself and haven't tested, but read this:

 

AlphaFunc:

 

Determines the alpha test function used when rendering this map. Valid values are GT0, LT128, and GE128. These correspond to "GREATER THAN 0", "LESS THAN 128", and "GREATER THAN OR EQUAL TO 128". This function is used when determining if a pixel should be written to the framebuffer. For example, if GT0 is specified, the only the portions of the texture map with corresponding alpha values greater than zero will be written to the framebuffer. By default alpha testing is disabled.

 

 

Both alpha testing and normal alpha blending can be used to get textures that have see-through parts. The difference is that alphaFunc is an all-or-nothing test, while blending smoothly blends between opaque and translucent at pixel edges. Alpha test can also be used with depthwrite, allowing other effects to be conditionally layered on top of just the opaque pixels by setting depthFunc to equal.

 

 

So, in theory, this shader should work. Please anyone correct me if I'm wrong, it's untested.

 

textures/mapname/shadername

{

qer_editorimage textures/mapname/texturename

surfaceparm trans

{

map textures/mapname/alpha_mask

alphaFunc GE128

depthWrite

}

{

map textures/mapname/env

tcGen environment

depthFunc equal

}

{

map $lightmap

blendfunc filter

depthFunc equal

}

}

 

So, you need two images: your env map, and an alpha map (.tga with white objects in it, no transparent pixels)

[AshuraDX]

okay will paly around with this
I want to achieve a glossy oil puddle decal for an efx file so I can scrap the lightmap I guess

EDIT: I got this , and it doesn'T look like it's working in ShaderED2...
 

gfx/newfx/puddle_decal
{
    surfaceparm    trans
    polygonOffset
    q3map_nolightmap
    {
        map gfx/newfx/puddle_mask
        alphaFunc GE128
        depthWrite
    }
    {
        map gfx/newfx/puddle
        blendFunc GL_ONE GL_ZERO
        depthFunc equal
        rgbGen lightingDiffuse
        tcMod scroll -0.05 0
    }
    {
        map gfx/newfx/puddle_env
        blendFunc GL_ONE GL_ONE
        depthFunc equal
        glow
        tcGen environment
    }
}

[Szico VII]

What you really want is a way to get blendfund blend working with an envmap and no mask image..