Blue cloud texture with Paint.NET

Creates a background from an array that repeats.

1) Create a new image with even dimensions. In our example, the size is 320 x 240 pixels, the screen resolution of an 80s microcomputer, which will now become a simple tile for us to fill the wallpaper.

2) Select the blue color of the sky.

3) Go to Effects -> Rendering -> Cloud.

Create a flake background with 220 for the scale and 0 for the surface texture.

4) It remains to create tiles to get a regular texture.

1. Cut the image vertically into two sections. To do this, choose 320 x 120 pixels.
2. Copy to clipboard, paste into new image.
3. Return Vertically.
4. Zoom in to 320 x 240 pixels.
5. Copy half the image again and drag it down.
   The bottom edge is now in top edge continuity.

We do the same thing horizontally.

1. In the new image, make a choice of 160 x 240 pixels.
2. Copy and paste into a new image.
3. Zoom in to 320 x 240.
4. Return horizontally. The picture is placed on the right.
5. Insert the start half of the image again, it will be located on the left. Press Enter.
6. The right face is in continuity with the left, there is a reproducible two-dimensional pattern.
   

5) Check pattern

Test source code:

<div 
 style="width:640px;height:480px;background-image:url(images/nuage-bleu-tuile.png)">
</div