We can use similar techniques to the last recipe to add color variation to the leaf material. However, we don't just want to paint some color changes all over the leaf. If you examine the original scan, you will see that the veins are less affected by leaf discoloration. We will therefore set our
ivy-leaf-vein texture as a stencil to mask the veins from the effects of the discoloration texture.
You will need to open the blendfile,
ivy-leaf-05.blend, saved at the end of the last recipe. If you did not complete that recipe, you can unzip it from the
ivy-leaf.zip file available from the Packpub website as: chapt-06/ivy-leaf.zip.