Got this pic and the following info from taimur.org . The yellow pigment in the painting has been created using the urine of mango fed cows. Though it says just mango, I am pretty sure it is ripe mangoes. Ripe mangoes are high in pitta. The fire element. Yellow in color. And since cow urine is considered sattvic, it can still be used in painting which is considered a sacred art. This is an example of a non-health application of ayurveda.