Forum: Carrara


Subject: Light cone goes through solid non-transparent objects? Bug?

cdisdero opened this issue on Nov 12, 2001 ยท 6 posts


cdisdero posted Mon, 12 November 2001 at 2:01 PM

Attached Link: http://www.zipcon.net/~cdisdero

I have Carrara Studio 1.1 (1.0 with update applied). I cannot figure out how to get the light cone to stop penetrating the solid cube object below it. Am I missing something obvious? I have the light range set to only 6.00 inches. Is this a known bug? Any help is most appreciated!

nyar1ath0tep posted Mon, 12 November 2001 at 3:09 PM

I checked back through the old messages (using the Search link above) and "light cone" in the text field. It appears that light cone fall-off doesn't work in Carrara, and that light cones interfere with other processes, like g-buffers (post-render effects). So light cones may also interfere with transparency. Maybe your cube isn't set to cast shadows, but I doubt that would change the effect, especially if light cones also interfere with that property. Is your cube set for shadows?

Even though some post-render effects are disallowed if the output file format isn't correct, I doubt that using an actual tiff render (rather than the area render) would give you the correct light cone effects. Did you try a tiff render in the render room (with other effects disabled)?


tkane18 posted Mon, 12 November 2001 at 3:37 PM

You need to enable 3D shadows under the light cone properties. I had that same problem on a scene that I was working on a few months ago.

cdisdero posted Mon, 12 November 2001 at 6:51 PM

Attached Link: http://www.zipcon.net

Thanks for the suggestion, but I tried enabling 3D shadows and various buffer settings. The result: No light cone at all! I tend to believe that it works for some fortunate few but not for all. Sounds like another case of Carrara bugs - another reason to drop this program and move up to Cinema 4d or Lightwave.

hiker posted Mon, 12 November 2001 at 8:47 PM

Just tried to recreate your problem and got exactly what you show. Changed range to about the distance between light and object and changed range falloff to 100%. That got rid of the effect for me. Hope this helps.

vhigh posted Tue, 13 November 2001 at 9:45 AM

I was working on a project in CS with spotlights and I was trying to get the filters to work. Only the light cone seems to work. I had to use blubs to get the other lens effects i.e. Cross flare or lens flare. This too seems not to work. The book says any visable light source can use the filters but this does not seem to be true. My render was disabling more than usual too.(Please See Disabled Render above). As usual, I bitch that RDS worked just fine and that Carrara is just a repackaging of RDS in a new goofy GUI which I don't care for. I'm hoping Eovia will iron it all out for not too much more money. I hope everyone's expectations come true for CS 2.