I have long enjoyed the intricate mandalas painted by Jack Wise. In particular I like how he often flows the same pattern through various color changes or shading.
In his early 30s Jack Wise moved from the United States to British Columbia, Canada, to pursue a life as a homesteader. That was in the early 1960s. After a brief hiatus, he returned to his painting with a passion that lasted the rest of his life. Wise was known for his calligraphy based upon Chinese brushwork, and for his colorful mandalas which embody a Buddhist cosmology.
I originally had one of Jack Wise's mandala paintings on this blog post, but was requested to remove it. I did. Nonetheless, you can see some of his wonderful artwork here. Click on the yellow word "Contemplate", then on the yellow word "mandalas". Be sure to look at the detail images for each painting.