If you want to create a bumpmap this will give you the "gradient" but I don't know how well it will "bump" (I assume you know C fairly well and PhotoShop.) 1. Create a model of your thorn. I used the spline modeler and oriented it spike up in the assembly room. 2. Insert an isometric camera and using the directors camera place it above the thorn. Switch to iso camera and using the zoom in the properties tray size the thorn in the frame. 3. Do a render in the render room selecting Photoshop format output (.psd) and check "distance" in the G-Buffers. 4. Save and then open the render in photoshop. The height map of the thorn will be in the 4th channel of the render. You will be able to copy it and make your bump map from there. If you have Anything grooves you can recreate the thorn but I don't know why you would want to. :-) The image gives a rough idea of what's going on.