MaterialDef MapOverlay {

    MaterialParameters {
        Texture2D ColorMap
        Vector2   OverlayOrigin   // Overlay-Position in Bildschirm-Pixeln (bottom-left)
        Vector2   OverlaySize     // Overlay-Größe in Pixeln
        Float     FadePx : 5.0   // Breite des Weich-Übergangs in Pixeln
    }

    Technique {
        VertexShader   GLSL150: Shaders/FogOfWar.vert
        FragmentShader GLSL150: Shaders/MapOverlay.frag

        WorldParameters {
            WorldViewProjectionMatrix
        }

        RenderState {
            Blend Alpha
            DepthWrite Off
        }
    }
}