Hello,
does someone know a good method how to make glare effects ?
I am wondering which data can be used to get kind of an alpha channel for that thing.
here is a picture, this is what I mean:
so.. if I could get an alpha of the hot spot of a reflective surface, or the specular highlight. I could use that in post for some nice glare, star or shine effects.
the question is just, how to get it out from vray ?
any ideas ?
thx a lot for every hint and suggestion,
bernhard
Render float. Make the lightsource causing it pretty bright and do a luma key. Daddaaa 
Regards,
Thorsten
hmm…
so you mean, I should increase teh value so much, that I will get a very high floating value of the speicifc material ?
and after that, just add it on top of the regular render in post ?
hmm.. but I would need to render a seperate run with the high values…
if I do understand you right… hmm, thx for the info…
any other ideas ?
bernhard
Check out Frischluft. They have some great plugins for the glare stuff.
I’d go with Trapcode Starglow now days. More control over output (like color shift):
http://www.trapcode.com/products\_starglow.html
As to your original question - just make sure output is unclamped, and isolate just the really, really burnt out areas and/or spit out a specular and reflection pass and grab the high areas from those.
Also, try adding an UnclampedColor element with a multiplier of ~0.3 and color mapping off. It will help spit out the highs without needing to render to a 16 or 32bit format.
This one helps me a lot: Red Giant | Professional Tools for Motion Graphics, VFX, and Video…
ok
allright.. thank you guys for all your nice ideas…
I guess teh unclamped spec or highlights will be the one I will choose..
let’s see if I can make it magic… lol…
thank’s a lot
all the best,
bernhard
