Can no longer find awesome brush mode

Hi all.  I'm hoping someone can help me find a fab brush mode I've previously used but can longer identify.  If you look at the posted image of the village, you will see brush strokes criss crossing over each other adding a nice bit of colour burn each time.  I  don't need to change colours it just picks it up from the image.  Now I've come to use it again I can't work it out.  I've been through all the brush modes inc colour burn, dodge etc. I just use a simple hard round brush.  Also tried it with opacity turned down but no luck.

Any ideas much appreciated?

Regards

Darren