The original with a horizontal fip blended with Difference. Flatten, new layer with a vertical flip, blended with Difference. Flatten. In this case I added another layer of Glowing Edges blended with Multiply. I learned this from cpanaioti
Another beautiful image. I thought I added this to favourites the other day, and left a comment, but I don't know what happened. Anyway it's in my favourites now.