Note: This is the third (and last) part of a tutorial, read first part and second one in case you haven’t.
Before focusing on minimizing the size of the finished 1k notebook design, I made several experiments on different methods of texture generation to try to simulate the paper. Unfortunately neither of them was enough small and give good visual results at the same time. So I decided to explain it here, next one was the best style looking of all the ones I tried.
The algorithm is based on a different step sequence applied in order. First step is to generate a bunch of black to white random gradient covering the whole canvas. Each one is copied to a second canvas with a ‘difference’ brush applied. This means, before pasting the gradient to the canvas, check the destination and origin pixels and compare them, store the absolute difference between the two on the destination canvas. The code to do this is really small.