Combining Textures

Even though we have used nodes, we haven’t created anything that can’t be created using regular shaders, but that’s about to change. So far, we can see the water moving but it stills look static, and that’s because the ripples are always the same. We have several techniques to generate ripples, and the simplest one would be to combine two water Textures moving in different directions to mix their ripples, and actually, we can simply use the same Texture just flipped to save some memory. To combine the Textures, we will sum them and then divide them by 2, so basically, we are calculating the average of the textures! Let’s do that by doing the following:

1. Select all of the nodes between Time and Sampler 2D (including them) creating a selection rectangle by clicking in any empty space in the graph, holding and dragging the click, and then releasing when all target nodes are covered:

Figure 10.45: Selecting...