<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:verdana,helvetica,sans-serif;font-size:10pt;color:#000000;"><div>Hi Guys,<br><br>I have 2 renderers layered one over top of the other. The renderer behind holds a bunch of images, and the renderer in front acts as a drawing plane where a user can draw over the image.<br><br>Problem is, both renderers come up fine. But once I zoom in, everything goes dark. However, once I draw somthing on the front renderer, THEN zoom... everything seems happy. So it appears vtk didnt like the fact that the top renderer was empty.<br><br>Does anyone have any experience with this? Please help.<br><br>Thanks<br><br>John E<br></div></div><br>
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