I am experimenting with procedural terrains in Vue5 and although I have managed to get the hang of creating a realistic terrain I am not sure how you apply a texture to it. When I try to add one of the standard rock or landscape textures from the materials palette in Vue I get the message shown in the picture. What exactly does this mean? Some textures produce this message and some don't. Am I supposed to click Yes, No or Cancel? Any help on this would be greatly appreciated.