test tubes

[thejobe]

i was doing some tests with the IBL and wanted to see what i would get with glass objects

[Korken]

Hi!

 

Nice start, but there can be some improvemnts.

It seems like there is low transparency, crank it up abit and use Index of Refraction with that and you can get awsome glass.

 

This is one I made, but is isn't finished yet but you can compare to atleast.

 

//Emil

Sweden

 

[attachmentid=19445]

[thejobe]

made a few fixes

[bentothemax]

It looks good for a start.

 

The glass seems to dark though, more like a tinted windsheild, than clear glass. What are your settings?

[Korken]

If you want, then you can try to set tansparency to >95% then you will get clear glass.

But to be sure, please post your settings.

 

//Emil

Sweden

[MattWBradbury]

That tinted glass can be caused by two things. You may have too high of an index of refraction, and your Ambiance Occlusion could be making the area too dark underneath and arround the glass.

 

My suggestion would be to make your glass models not cast Occlusion because glass wouldn't create that dark of a shadow (AO doesn't simulate transparencies); your glass looks like it has a fair ammount of tinting on it. Glass does cast some shadows, so you can add a light to give you some lighter shadows.

 

Looking good! Now just add some bunsen burners, and you'll be set.

[thejobe]

ok settings are as following

all glass objects

color: white

falloff: 120%

spec color: white

spec size: 50%

spec int: 80%

transparancy: 95%

refraction: 1.5

transluncy: 96%

reflectivty: 35

 

camera settings

multipass: on 16 passes

AO: on sampling 70%

 

choreograhpy settings:

IBL lighting:

AI: 21%

AO: 70%

map: HDR mirror shpere

exposure: 2

azimuth: 50

 

those are the settings i used

render time was 22 mins

[Korken]

One thing I see is that Index of Refraction is way to high.

If I'm not misstaken then 1.1-1.15 is often recomended but i used 1.07 in my glass.

 

This is going to look god when it's done just don't give up.

 

//Emil

Sweden

[thejobe]

ok made alot of changes to the glass to make it more transparant tell me what you think

[dude]

Much Better! Looks great

 

-dude

[trajcedrv]

Much better! Glass looks real!

[aaver]

[...]If I'm not misstaken then 1.1-1.15 is often recomended but i used 1.07 in my glass.

I don't know where you've got that information, but 1.07 is way too low. 1.5 is a good for ordinary glass.

[thejobe]

actually for this render i used just 1 for refraction 1.5 was too high and so was 1.07 always seem to make it too dark but 1 just came out good enough heres the new specs i used

 

all glass objects

color: white

falloff: 120%

spec color: white

spec size: 50%

spec int: 80%

transparancy: 70%

refraction: 1

transluncy: 90%

reflectivty: 35%

 

camera settings

multipass: on 16 passes

AO: on sampling 70%

 

choreograhpy settings:

IBL lighting:

AI: 21%

AO: 70%

map: HDR mirror shpere

exposure: 2

azimuth: 50

 

some one tolded to bump up the spec on the glass to make it stand out more so im going to give that a try and see what shows up but im happy with these results

[Korken]

I must say it looks great!

 

But i still miss a little refraction. Maybe just try so set it REALY low, like 1.01?

It might give you the right effect.

 

[...]If I'm not misstaken then 1.1-1.15 is often recomended but i used 1.07 in my glass.

I don't know where you've got that information, but 1.07 is way too low. 1.5 is a good for ordinary glass.

>> I got that from one of my older posts, but I also think even 1.07 gives to much refraction.

Especially in round glass objects.

 

//Emil

Sweden

[Drakkheim]

Well if you're shooting for real glass its somewhere between 1.45 and 1.8ish

 

http://www.robinwood.com/Catalog/Technical...nIndexList.html

[thejobe]

i added a bunsen burner

and even 1.01 was making it too dark for some reason could be something with AO not sure but this gives it a good enough effect of glass