(Posted at DIYC also). Newbie with HLS here. I have built a 40 string megatree with 90 pixels per string in HLS' preview pane and in the manage channels portion of the software. I have assigned universes to all pixels, have assigned the strings and all pixels to display groups, and it looks like all are properly "mapped' over to the preview panel when I look at the channels (including verifying all pixels are showing up when drilling down into the models) in the preview panel. Yet, when I run the effects that I setup in a "dummy" sequence specifically to build my MT model in the preview panel, I get no action from the MT on the preview panel. I have read and watched videos and I am not seeing what I am missing here; anticipating it will be something really simple. Thanks in advance for whatever help you can give me!