In this clip, you'll see how to construct a pass filter, commonly called a high-gain or band-pass filter. To do this, you'll use the HSV channels to identify what to do, the RGB curve to make an inversion mask, or negative, so that the image is added to itself, thus evening out the contrast and making a very flat image. This image can then be tiled and used as a seamless texture. Whether you're new to the Blender Foundation's popular 3D modeling program or a seasoned graphic artist just interested in better acquainting yourself with the application, you're sure to be well served by this free video tutorial. For more information, including detailed instructions, take a look!