Some hints on Backlit scenes

frank beckmann · Jan 21, 2015

Some hints on Backlit scenes

Simply what the title says. Just a few quick settings to get back some details in front of the camera when the sunlight strikes from ahead.
Any questions; let me know.
Link to the Light&shadow Table I once posted.
Cheers
Frank

Jeanny · Jan 22, 2015

Thanks Frank. I also appreciate this. All the help you give to others
has been a help to me also.

My Best
Jeanny

ZooHead · Jan 22, 2015

Very helpful, thanks Frank.

Joel · Jan 25, 2015

Ambient Occlusion ray length

This is a great help in comparing similar settings, but I don't get the AO max ray lengths of 1, 0.2, 0.1. My default setting is 10000. What am I missing here?

frank beckmann · Jan 25, 2015

Joel said:
... but I don't get the AO max ray lengths of 1, 0.2, 0.1. My default setting is 10000. What am I missing here?

Not sure - you can adjust the length to your liking. Most noticeable where the building meets the ground.

Cheers
Frank

Joel · Jan 25, 2015

Request for elusive forum URL

Frank, could you please post the URL for the "Light and Shadow Table" jpeg you posted years ago? Newer users would find the 22 examples a helpful adjunct to this gif, but I was unable to find it via Search. Adding a reply to it will bring it back to the current Forum threads where it can be reviewed.

Thanks again.

frank beckmann · Jan 25, 2015

I added the link as you wish at the thread opening.

Cheers
Frank

Chris Heath · Feb 28, 2015

Thanks Frank

That's really helpful for understanding the different lighting settings.

Cheers

Chris

podperson · Mar 2, 2015

Somewhat off-topic

C3D's ambient occlusion seems to behave very oddly to me. I assumed ambient occlusion is supposed to darken nooks and crannies, but while it does this, C3D's ambient occlusion seems to just flood scenes with light for no apparent reason.

When I first started using C3D I didn't find ambient occlusion terribly useful, and just got in the habit of always using radiosity (which, if anything, brightens nooks and crannies, but otherwise does a nice job). But, having now used ambient occlusion in other programs, it seems to me that C3D's ambient occlusion is a bug. In particular, once you use any significant amount of ambient occlusion, shadows are pretty much blown away, which is definitely not what it ought to be doing.