OpenMW/files/materials/sky.mat

material QueryTotalPixels
{
    allow_fixed_function false
    pass
    {
        vertex_program sun_vertex
        fragment_program sun_fragment
        cull_hardware none
        polygon_mode_overrideable off
        depth_check off
        depth_write off
        colour_write off
    }
}

material QueryVisiblePixels
{
    allow_fixed_function false
    pass
    {
        vertex_program sun_vertex
        fragment_program sun_fragment
        cull_hardware none
        cull_software none
        polygon_mode_overrideable off
        depth_check on
        depth_write off
        colour_write off
    }
}

material openmw_moon
{
    allow_fixed_function false
    pass
    {
        vertex_program moon_vertex
        fragment_program moon_fragment
        cull_hardware none

        polygon_mode_overrideable off
        depth_write off
        depth_check off
        scene_blend alpha_blend
        
        texture_unit diffuseMap
        {
            texture_alias $texture
        }
        
        texture_unit alphaMap
        {
            direct_texture textures\tx_secunda_full.dds
        }
    }
}

material openmw_clouds
{
    allow_fixed_function false
    pass
    {
        vertex_program clouds_vertex
        fragment_program clouds_fragment
        
        polygon_mode_overrideable off

        scene_blend alpha_blend
        depth_write off

        // second diffuse map is used for weather transitions
        texture_unit diffuseMap1
        {
            texture_alias cloud_texture_1
        }
        
        texture_unit diffuseMap2
        {
            texture_alias cloud_texture_2
        }
    }
}

material openmw_atmosphere
{
    allow_fixed_function false
    pass
    {
        vertex_program atmosphere_vertex
        fragment_program atmosphere_fragment
        
        polygon_mode_overrideable off
        
        depth_write off
    }
}

material openmw_stars
{
    allow_fixed_function false
    pass
    {
        vertex_program stars_vertex
        fragment_program stars_fragment
        
        polygon_mode_overrideable off
        
        depth_check off
        depth_write off
        scene_blend alpha_blend

        texture_unit diffuseMap
        {
            direct_texture $texture
        }
    }
}

// used for both sun and sun glare
material openmw_sun
{
    allow_fixed_function false
    pass
    {
        vertex_program sun_vertex
        fragment_program sun_fragment
        cull_hardware none

        polygon_mode_overrideable off
        
        depth_check off
        depth_write off
        scene_blend alpha_blend
        
        texture_unit diffuseMap
        {
            direct_texture $texture
        }
    }
}