Voxel track ballast

Here's a quick idea I had taking the previously discussed voxel technique and applying it to the ballast in Rail Simulator. This creates a more realistic looking '3D' ballast, especially if you notice the area around the sleepers where you can even make out individual stone chips.

Here's a simple animated GIF to show the ballast with and without the voxel effect applied. In the following example, I've only created the voxel effect around the sleepers (and hence why it's the only area of the ballast that changes in the image). Obviously if this was going into a route, I'd apply the voxel effect to the entire ballast section.