Thanks for the texture, Groingrinder! Here's a couple examples of the aforementioned #2 method, contrasted with just a straight aliased render of Groin's texture. Both the plane and the cube use his texture, which I might add tiled wonderfully (woo hoo!). The cube has a separate, only slightly bigger cube driving a Blend Transparency material made with the DTE. If I turned down the spec. a bit, it would look more like oil I guess... Using this separate cube, one can adjust the "scale" or noise of the oil/dirt to fit the scale of the scene. I had some difficulties adjusting the scale of the photo-based texture...