Hi, you can do this will almost any picture, you looking for things like open windows, doors, maybe outside the garden something that would reflect on the eyes. First convert the image to greayscale in photoshop, then open the eye texture you would like to modify, copy the greyescale image and paste it to the eye texture as a new layer, set this new layer to screen, soft light works good as well but it darkens the image a little then just move the overlaying image to what you want to reflect in the iris by moving. transforming and rotating. then merge all layers and you are done. Another way would be using the b/w texture as a transparency map on the cornea materials on your figure. I was working on these just yesterday they are for any Daz ver. 3 figure and I can send them to you if you like. if you don't want them for any of the daz figures you can still use the textures by following the steps I said above for any other figure. I hope this helps, I will relese this new reflections on freestuff soon I need to finish a few things first.