SHADERMODE_LIGHTSOURCE, ///< (lightsource) use directional pixel shading from light source (rtlight)
SHADERMODE_REFRACTION, ///< refract background (the material is rendered normally after this pass)
SHADERMODE_WATER, ///< refract background and reflection (the material is rendered normally after this pass)
SHADERMODE_LIGHTSOURCE, ///< (lightsource) use directional pixel shading from light source (rtlight)
SHADERMODE_REFRACTION, ///< refract background (the material is rendered normally after this pass)
SHADERMODE_WATER, ///< refract background and reflection (the material is rendered normally after this pass)