beer bottle 'glow' ?

[emartin8907]

Hi,

I am wondering how to achieve this kind of glowing effect I see in many beer bottle ads

example;

https://www.behance.net/gallery/20804361/3D-CGI-Bottles

https://www.behance.net/gallery/8954...tising-Imagery


I currently have a bottle with geometry inside of it for the liquid. I have a strong backlight on it, but no matter what I do with my materials I can't seem to get this look. my render just comes out flat looking


Any help or insight is greatly appreciated!

[francomanko]

you should probably give a little more detail on your lighting setup.

[Raven]

Just create a background similar to the one in the reference you posted. It refracts through your bottle and beer. Then you just need your lights from the left and right.

https://mir-s3-cdn-cf.behance.net/pr...c643b9fc41.jpg

[emartin8907]

interesting idea about using the background for lighting map! I will try this. I think my problem was with the modelling of the liquid!

My light set up is very simple, two large tall key lights left and right behind camera illuminating bottle front and a small strong kicker at 12 oclock to camera blasting the bottle from behind. I will do more testing with new liquid geometry and post back thanks!

[ricoholmes]

I do quite a lot of product shots for various breweries. The glow you're after is best achieved by a light behind the bottle.. Very soft texture gradient/falloff, and it's sometimes a juggle to get it just right (bearing in mind the bottle with liquid is just a big lense at this point . You'll also need a couple of reflection blockers (dark cubes are fine, primary visibly off) to the sides. vary works perfectly fine when replicating a traditional photography setup for bottle work.
Tip: make sure your light cutoff is set lower than normal, otherwise there's a tendency to get a hard black edge in areas you would otherwise get a smooth gradient.

[Raven]

If I get a chance I'll try post a test scene tonight. I did one a few years back that the client wanted to look pretty much the same as the Munkholm ones.

[Nearl]

You need translucency enabled on your beer.

[emartin8907]

Thanks everyone! These suggestions look very helpful

I think I am still having problems with modelling the liquid though..

I tried modelling the liquid inside two ways; 1. selecting an edge inside the bottle, creating a shape from it, and then lathing that shape. This doesn't really look correct though



2. I created a cylinder around the bottle w high subds, and then used boolean subtract to cut away where the bottle intersects and then converted to edit poly and deleted the leftover geometry outside of the bottle. This is a little better than first attempt but now am getting these horrid squares where geometry is intersecting because subs from cylinder wont align with the original geometry on the bottle i mean how could they.



I have included my scene with both liquids and my materials. And here is a snapshot of my lighting setup



bottle_test.zip

[Raven]

Your liquid needs to overlap with the inside of your bottle. After doing the lathe maybe apply a push modifier to expand the liquid.

[Raven]

I've updated your file with a few changes.
Push modifier on the lathed liquid.
Changed the glass material to use fog not refraction colour.
Also your coffee material fog colour value was a 255 which makes it clear.

Also tweaked the lights a bit. The gradient on the back light was causing a small hot spot.
Not sure if this is the look you are going for, but hope it helps

[emartin8907]

Wow thank you so much Raven! That is exactly the look I was going after, I have just learned so much. I never knew the liquid needed to overlap the glass like that I thought maybe it was inside of it. Cheers man thank you!!

[t.petrov]

Here it is explained in more details: https://docs.chaosgroup.com/display/...ace+Interfaces

[emartin8907]

thanks t.petrov! That is an EXCELLENT explanation and write up