Hi Verlie,
Are you talking about sun painting? I have gotten some beautiful results using plain Pebo fabric paints and PFD white cotton fabric. you dilute the fabric paint so its very watery, paint your fabric and then find a place to put your fabric in the direct sun (you might need to pin it down). Warm days work best. Cover the fabric with your choice of leaves, flowers, or whatever else you want to imprint on your fabric. I usually let the fabric dry outside in the sun for at least an hour, longer if its cool out. At this point, you can then just heat set your fabric with an iron. If you need to wash your fabric, wait 24 hours.
Hope this helps.
I uploaded an example, its in my profile, the title is Road to Tahoe. The trees are sun painted.
Drew