Overcaster and FPrime

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Old 03 March 2004   #1
Overcaster and FPrime

Are there any problems with rendering in Fprime with the Overcaster plugins?

Old 03 March 2004   #2
to the best of my recollection, overcaster is something that is used to set up lighting in a scene... it's not anything that's called up at the time of render like a surface shader... it should be fine
Old 03 March 2004   #3
Nope, no good.

It does NOT work with OverCaster because OC uses Shadow Maps and they don't work with FPrime.
Robert Wilson
UnCommon Grafx
Old 03 March 2004   #4
Quote: Originally posted by uncommongrafx
Nope, no good.

It does NOT work with OverCaster because OC uses Shadow Maps and they don't work with FPrime.

Just change em all to raytrace shadows in the Spreadsheet...and spin away!

Also, try out Distant Lights as your Light Rig setup...

Old 03 March 2004   #5
No need to go to the Spreadsheet, F-Prime will automatically convert all shadow mapped spots to ray traced spots.

One gottcha is that if you have excusively used shadow mapped spots in a scene you may not have ray traced shadows turned on in the render pannel.
Anothher gottcha is that the F-Prime pre-viewer does not do motion blur (esential for Overcaster), but the F-Prime Renderer does. And it is a lot better motion blur than LW so your Overcaster renders should have a lot more even shadows.
Kernow bys vykken!!!
Old 03 March 2004   #6
I've used Eki's light setups with FPrime without a problem, didn't need to change anything, however he uses hidden polygonal objects to control his rigs and an apparent bug in FPrime causes shadows from the hidden objects to be rendered even though they are set to unseen by rays, camerea and fog. I sent a report to Worley about the problem and am waiting for confirmation.

Edit: this problem only seems to occur with radiosity active.

Last edited by bloontz : 03 March 2004 at 04:40 PM.
Old 03 March 2004   #7
Radiosity AND Overcaster? What kind of scene is that? I'm confused.
Old 03 March 2004   #8
Quote: Originally posted by Zarathustra
Radiosity AND Overcaster? What kind of scene is that? I'm confused.

I was using one of the plug pak preset scenes (3 point lighting) and decided to see how radiosity would effect it when I discovered the problem. I get your point, using radiosity with overcaster is overkill, just wanted to point out the problem for those as silly as me, or those that come accross this problem unexpectedly.
Old 03 March 2004   #9
That's cool. I thought I wasn't understanding something.
Old 03 March 2004   #10
Why can you use FPrime's RENDER option for motion blur and not the PREVIEW? Is this the limitation of OpenGL?
Old 03 March 2004   #11
Well, my guess is that they want to keep the preview window as responsive as possible.
Don't know why, though, since the motion blur would only show up after a few iterations (passes) anyway, but I'm not a programmer so...
Old 01 January 2006   #12
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