Thank you both for your comments. Very helpful. I am already familiar with the leads aforementioned. My two matrixes will have 650 and 600 pixels, respectively, with 3" spacing between the pixels. I have only auditioned pics within my sequences and have not settled on any of them yet, because I could not get any quality out of any. I am using simple, not detailed pics that I have found on Yahoo images. When I decide on what pics to try, I'll post these. I could purchase stock photos, but that is useless unless I can be assured of quality through this process. I have been resizing using Light Image Resizer 4 (paid version). Thanks so much.