Or use a simple material in postprocess. see picture. In this case, the backdrop must be set to "Camera invisible" which gives no "Signal". The "if" checks this, and uses in the "no Signal-area" the given texture.
Hope that's helpy, Matthias ----- Original Message ----- From: "Matthias Kappenberg" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, February 18, 2007 10:47 AM Subject: Re: Why Raytrace a Video ? > Matthias > ----- Original Message ----- > From: "studio" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Sunday, February 18, 2007 9:27 AM > Subject: Why Raytrace a Video ? > > > > Maybe I'm missing something obvious : > > > > I have a 500 frame 720 x 480 video that I want to deposit > > Realsoft CGI into . However , when I load the video as an > > 'Image Object' so that I can have the video available as > > a 'Camera Backdrop' Realsoft wants to raytrace the whole > > 500 frame video for my animation previews . > > > > Any idea why ? > > > > The Camera Backdrop does not need to be raytraced . > > Just select the 'Image Object' and in wireframe mode > > the cam-backdrop video will play in realtime . > > > > In fact , any raytracing only softens the video in > > the resulting output . (Well , I guess I could crank > > the quality settings way up and then go out of town for > > a few days ... ) > > > > The workaround is of course , to render only the CGI > > as a .tga with an alpha channel , and then bring that > > sequence into AFX/Premiere/etc. , but it seems like a > > lot of work for simple anim previews . > > > > The frustrating part is that RS will easily update > > the 'Camera Backdrop' at 30 fps without any rendering > > required , in wireframe mode , but as soon as it's > > time to render , the backdrop slowly get's raytraced . > > > > Maybe this is just how RS has to work ... it has to > > raytrace the whole 720 x 480 screen even if the CGI > > element is only a few dozen pixels ? > > > > I think ideally , we would have a switch to turn off > > background raytracing as well as the option to render > > the CGI's antialiasing with the background , or not . > > > > This is the kind of thing that should have been there > > 10 years ago , as well , in my humble opinion . Sorry > > if I've missed the obvious "in Realsoft" solution . > > > > thanks > > > > studio > > > >
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