public override void Update(RenderContext renderContext)
 {
     renderContext.SetShader(sp);
     renderContext.SetShaderParamTexture(Textureparam, Tex);
     renderContext.SetShaderParamTexture(NormalTextureparam, NormalTex);
     renderContext.SetShaderParam(Shininess, 16.0f);
     renderContext.SetShaderParam(SpecularLevel, 256.0f);
 }
 public override void Update(RenderContext renderContext)
 {
     renderContext.SetShader(sp);
     renderContext.SetShaderParamTexture(Textureparam, Tex);
 }