CG Sketchbook , notes and tutorials

Tip: wavelet decompose : a good cure for tiling patterns.

When making tiled textures you must avoid big repeating patterns , that will ruin the look of a texture from the distance.

Here’s a good article about the use of highpass filter :

The idea is that you can extract the “high frequency detail” .. that is small patterns , which will look good and with enough variations when tiled.

That  also means getting rid of big shadows and gradients that you don’t need in texture .

Following the same concept , you can use wavelet decompose (as a gimp plugin) :

You’ll get  various layers , each containing different sizes of detail ,  stacked to compose the original image .

Then you can easily find a layer with the size of detail you want to enhance (unsharp mask , contrast) or remove (simply erasing parts) .

I find that a very efficient way of both sharpening the map and removing low frequency noise (big patterns and shadows).


2 responses

  1. mifth

    It’s called equalization.

    October 13, 2010 at 9:35 am

  2. Hi,
    I didn’t know that name , But it’s just right : “Equalization” just like in audio , is tuning the different wavelenghts (here intended as the dimensions of details in images)

    It’s a good name both for the process done via “highpass” and even more for the “wavelet decompose” version ..which really works like multi-band equalizer does in audio.

    November 15, 2010 at 10:15 pm