Background Object need Help!!

[gpro]

Hello-

I hope someone can help me with this issue. I contacted Tech support at Maxon and they could not help.

 

I'm using a background object with an image loaded that was a render of the background geometry. I'm rendering the foreground geometry with the background image. The problem I'm having is that the background is slightly blurred and therefore does not composite well with the foreground. How do I keep this from happening? The image I endered is the exact same dimensions.

I found on another forum a statement made about this issue some time ago:

 

"Just keep in mind c4d isn't a program meant for compositing. If in your render settings antialias window you set the aa to "best" then the background image will render out slightly fuzzier than it really is. You might want to render an alpha channel too for compositing in something like after effects."

 

I would love to be able to do this without After Effects. I know it's possible to do this in 3D Studio Max. Of course I prefer C4D, but this really is a HUGE issue for me. I really need to get this to work.

 

G.

[Sindala]

well, if you render it with alpha channels turned on and safe it as a tiff or psd, you get a channel which you can use to make a selection in photoshop, or probably after effects, then copy paste to a new layer, and insert your background layer under you new layer. Very handy.

 

I suppose you already have the render you want, so to save rendertime you could probably make another render without gi, reflections etc and copy the alpha channel to your other image.

 

hope this helps

[gpro]

Sorry, I should have mentioned this was an animation.

[STRAT]

put a render tag to the backround object and force the AA settings up in it.

[Frosty]

I've never used the Affter Effects output of C4D...sooo I might be blowing smoke out of my magic butt.

 

Can you not create a tag that renders the foreground geomtry to an After Effects layer with alpha and then comp in post?

 

I understand that you're trying for a one stop shop,but I think this might be a better solution. I post process almost everything I render - it saves a lot of time.

[gpro]

STRAT-

 

I did use the tag and forced AA, but for some reason C4D still renders it fuzzy.

 

Frosty-

 

This is the alternative that I was hoping to avoid. I use to use 3D Studio Max and was able to do all comping in the 3D program. It saved so much time and prevented me from having to learn yet another program. I guess that's what I will do, but it amazes me that C4D can't do this. I contacted Tech support and they acted like this technique is never used. I know this can be done, it has to be!

[Sindala]

I'm not big in animations, but you can't force antialiasing if it is set to geometry in the render settings.

 

If you set it to best you can make it render a bit faster by lowering the max level to 1x1. the object you force with the tag will come out the way it's stated in the tag instead of the render settingstab.

[gpro]

I'm not big in animations, but you can't force antialiasing if it is set to geometry in the render settings.

If you set it to best you can make it render a bit faster by lowering the max level to 1x1. the object you force with the tag will come out the way it's stated in the tag instead of the render settingstab.

 

 

Yes, you would think, but I ran several tests using all levels of AA and it still renders fuzzy even with the composite tag. I also tried several Min/Max level combinations, Threshold adjustments, and changed the texture sampling to "None". Nothing worked.

[Jorge Arango]

This was discussed a while ago in the French Cinema forum:

http://www.frenchcinema4d.com/forum/

I don't remember what the conclusion was. A lot of people there speak english so, I'd ask in english,

Also, you could ask in the 3dfluff forum:

http://forum.3dfluff.com/

I guess Janine and Mash are experts in the field of backgrounds.

Hope this helps,

Jorge Arango