Glass refraction with bottle+water

Forums: Glass refraction with bottle+water
VIP Information, news and announcements regarding new Octane Render commercial products and releases.

Glass refraction with bottle+water

Postby FLXmedia » Fri Jul 07, 2017 2:49 pm

FLXmedia Fri Jul 07, 2017 2:49 pm
Hello guys,

since i am new to octane, i find myself in a tricky situation, where i need to render a bottle of gin.
With the standard Cinema4D physical renderer, the refraction in my bottle (and on the edge) looks much more realistic than my rendering on Octane.

I attached three images to this post. 1. is the original Cinema4D Physical Render. (Water index 1,33)
2. is the Octane render with a standard glass material from the Live DB (Index:1,65) and a water material at Index: 1,01.
3. is the Octane render with the same glass material (Index: 1,65) and the water material at Index 1,3.
4. a real picture showing the desired refraction.
Can you please look at them and tell me, what i did wrong?

The bottle itself is constructed with a lathe-object with the liquid being another lathe object intersecting with the bottle.
Is this modelling technique wrong?

Thanks in advance for your help and time!

Greets,

Felix
You do not have the required permissions to view the files attached to this post.
FLXmedia
Licensed Customer
Licensed Customer
 
Posts: 3
Joined: Wed Jun 14, 2017 8:01 pm

Re: Glass refraction with bottle+water

Postby bepeg4d » Fri Jul 07, 2017 3:17 pm

bepeg4d Fri Jul 07, 2017 3:17 pm
Hi,
difficult to say with your screenshot, there is not too much to reflect/refract right now compared with your reference, but in OctaneRender, you need that the liquid is slightly overlapping the glass, to have the correct effect.
Or modelling in a different way, like explaned in the picture below:
IMG_0369.PNG

ciao beppe
You do not have the required permissions to view the files attached to this post.
User avatar
bepeg4d
Octane Guru
Octane Guru
 
Posts: 6695
Joined: Wed Jun 02, 2010 6:02 am
Location: Italy

Re: Glass refraction with bottle+water

Postby FLXmedia » Fri Jul 07, 2017 3:33 pm

FLXmedia Fri Jul 07, 2017 3:33 pm
bepeg4d wrote:Hi,
difficult to say with your screenshot, there is not too much to reflect/refract right now compared with your reference, but in OctaneRender, you need that the liquid is slightly overlapping the glass, to have the correct effect.
Or modelling in a different way, like explaned in the picture below:
IMG_0369.PNG

ciao beppe


Hi beppe,

thanks for your help.

I am looking for the refraction especially on the back label refracting to the bottle sides. I modelled it with a small overlap.. so you think i should model the liquid completely inside the glass?

Thank you!
FLXmedia
Licensed Customer
Licensed Customer
 
Posts: 3
Joined: Wed Jun 14, 2017 8:01 pm

Re: Glass refraction with bottle+water

Postby nuno1980 » Fri Jul 07, 2017 4:15 pm

nuno1980 Fri Jul 07, 2017 4:15 pm
Hi, FLXmedia :)

If you deserve "real life" then all specular materials must have dispersion. ;)

-- Glass settings:
reflection - 0.930
transmission - 1.000 (greyscale color)
ior - 1.509* (it's ior dispersed and the original ior is 1.53)
dispersion coefficient - 0.006*
rest default

-- Water at +/- 18 ºC settings:
reflection - 0.930
transmission - 0.998 (greyscale color)
ior - 1.323* (ior dispersed and original ior 1.333)
dispersion coefficient - 0.003*
rest default

* - see 2 formulas (convert from "abbe number" to "dispersion cofficient (= B)"; calculate from original refractive index (ior) to
ior dispersed) ---> viewtopic.php?f=25&t=61949#p316752 (look my message on Jun 24, 2017 11:37 am UTC)

--> I'm recommended you use PMC kernel for almost real life, if your videocard is very fast (eg: GTX 780, 980, 980Ti...). ;)
Last edited by nuno1980 on Fri Jul 07, 2017 7:49 pm, edited 1 time in total.
NOTE: I'm sorry for bad english due to mute ;)

i7-4790K w/ or w/o OC
16GB [email protected]
ASUS Z97-Pro Gamer
EVGA GF GTX 980 Ti SC+ Gaming :D
SSD OCZ RD400 512GB
HDDs 1TB SATA2 and 3TB SATA3.
LG BD-RE BDXL BH16NS40
PSU 1 kW
CRT monitor 19" SM 957MB
nuno1980
Licensed Customer
Licensed Customer
 
Posts: 617
Joined: Sat Dec 18, 2010 10:04 pm

Re: Glass refraction with bottle+water

Postby nuno1980 » Fri Jul 07, 2017 7:48 pm

nuno1980 Fri Jul 07, 2017 7:48 pm
LAST EDIT: water only (look my previous message) or

-- Water with 45% alcohol at 20 ºC settings:
reflection - 0.930
transmission - 0.982 (greyscale color)
ior - 1.350 (ior dispersed and original ior 1.360)
dispersion coefficient - 0.003
rest default

;)
NOTE: I'm sorry for bad english due to mute ;)

i7-4790K w/ or w/o OC
16GB [email protected]
ASUS Z97-Pro Gamer
EVGA GF GTX 980 Ti SC+ Gaming :D
SSD OCZ RD400 512GB
HDDs 1TB SATA2 and 3TB SATA3.
LG BD-RE BDXL BH16NS40
PSU 1 kW
CRT monitor 19" SM 957MB
nuno1980
Licensed Customer
Licensed Customer
 
Posts: 617
Joined: Sat Dec 18, 2010 10:04 pm

Re: Glass refraction with bottle+water

Postby FLXmedia » Fri Jul 07, 2017 9:04 pm

FLXmedia Fri Jul 07, 2017 9:04 pm
nuno1980 wrote:Hi, FLXmedia :)

If you deserve "real life" then all specular materials must have dispersion. ;)

-- Glass settings:
reflection - 0.930
transmission - 1.000 (greyscale color)
ior - 1.509* (it's ior dispersed and the original ior is 1.53)
dispersion coefficient - 0.006*
rest default

-- Water at +/- 18 ºC settings:
reflection - 0.930
transmission - 0.998 (greyscale color)
ior - 1.323* (ior dispersed and original ior 1.333)
dispersion coefficient - 0.003*
rest default

* - see 2 formulas (convert from "abbe number" to "dispersion cofficient (= B)"; calculate from original refractive index (ior) to
ior dispersed) ---> viewtopic.php?f=25&t=61949#p316752 (look my message on Jun 24, 2017 11:37 am UTC)

--> I'm recommended you use PMC kernel for almost real life, if your videocard is very fast (eg: GTX 780, 980, 980Ti...). ;)


Wow, thanks for your help man! I'm using the PMC kernel, since we are working with a 980ti.

But, have you done something similar before? How do i have to model? Slight overlap in glass/liquid or small gap between that?

Thank you very much for your help!!
FLXmedia
Licensed Customer
Licensed Customer
 
Posts: 3
Joined: Wed Jun 14, 2017 8:01 pm

Return to Commercial Product News & Releases (Download here)


Who is online

Users browsing this forum: maro and 1 guest

Fri Nov 15, 2019 12:16 pm [ UTC ]