struct Scene
{
    float4x4 Model;

    uint textureMode; // 0 = regular triple, 
                      // 0x10 = video yuv,
    // bit 0 == srgb correction
    // bit 1 == fullbright
    // bit 2 = reserved
    // bit 3 = reserved
    // bit 4 - 7 = color space:
    //   0 -> regular rgb
    //   1 -> regular video yuv // used for decoding video files

    int animation; // -1 means no animation, any non-zero value means an index into the animationBuffer
    uint flags; // 0 -> 0: always in front
                // 1 -> 1: useAltCamera
                // 2 -> 2: billboard (& 0x4)
    float float0; // uses:
            // in billboard mode: this represents the size
};

uint isBillboard(Scene s)
{
    return s.flags & 0x4;
}