I've had a couple of queries about the use of texture paste.
The main question is whether you can use texture paste only in the foreground. So I have a painting here that uses texture paste a bit further back in the picture.
As you can see it works just as well here.
This top photo shows the foreground stones.
Here are a couple of photos showing sections so that you can see how the paste has been applied and over-painted for the final effect.
Consider using a shallower texture in the further away section and then use a deeper texture in the foreground. By using the paste more thickly in the foreground you will help to give the illusion of depth to your picture and it will provide a nice contrast to the other section of texture paste too.