I figured that I would post what I did here for others to see how I approached it and to comment on my thoughts. I took a step back and with a deep breath did some research on custom panel layouts. It seems that I really needed to understand this because i made a custom panel layout somewhat akin to a cross between a Grid and a Canvas. Got it to auto size the composited bitmaps into the size of the panel by figuring out a global scale in the MeasureOverride. That way i still get the benefit of attaching pixel shaders to the image objects if i need to do saturation,chroma key etc... Please tell me if you think this could help others so i can think about making it an article if useful. Bryan