Just playing ...
-Cropped
-pasted blue channel into new layer, changed to luminosity blend mode
-Pasted blue channel into new layer again, changed to difference mode, was really dark but neat colors
-lightened with levels and curves
-selected light areas with control-alt-~ created mask with luminosity selection
-ran paint daubs filter on mask and then blurred mask a little
-used levels on mask to increase contrast of mask
voila, a new barn to play in
Roger