Glass with bubbles inside

[flipside]

Hi, here's a pic with glass material. The problem is in the biggest blob, where I have put an air bubble inside. The right blob has normals reversed for the inside bubble, the left pic not. I don't know which one looks correct, or even if any of the two look correct!

Who can help me or has done similar things before?



regards,

flipside

[egz]

The right one looks correct IMO.

Here's an old example I did about a year ago:

[flipside]

Here's the result:



render times +-15min on P3-800Mhz

flipside

[GoncaloP]

Hi Flipside, the glass material looks very nive!

I wonder why you are using a demo version yet!

Gonçalo

[flipside]

Hehe, I have my reasons....

But you can be shure that the next thing I buy will be vray advanced!

I was really completely surprised by the rendertimes and quality on the glass. In fr I spent months trying to get good glass, and then it rendered very slow because of the need for supersampling or that texture AA feature. If you visit my site, take a look at the glass pics, they rendered in about an hour for +-640*480 resolution, that was hell! (and that was only one glass!)

Hey goncalo, are you the same goncalo as in the fr forum?

greetz,

flipside

[GoncaloP]

So your welcome here!

>Hey goncalo, are you the same goncalo as in the fr forum?< Yes

Gonçalo

[thethule]

ahhhhh, good old kitchen.hdr
Looks really nice, great colour choices. I still get a kick from glass renders like this.


Marc

[586]

Wow, super! Your glass is perfect. Excellent job!

[flipside]

yeah the kitchen hdr rocks! I have many other hdr's, but none can match the kitchen! All I can find is usually outdoor scenes, and because the top half of the map is then usually sky, I find them pretty useless.

Anyone has some free interior hdr's? (I have some, but mostly with bad lighting, I'm really looking for small rooms like that kitchen, not musua or cathedral interiors)

thanks for the comments!

flipside

[RogerChen]

These glasses are so nice...I greatly appreciate these works...


I'm a new learner,
can anyone help me with this stupid question...

How to make glass material in Vray ????? included transparent effect.

I've tried two ways below:

1. Use a VrayMtl --> adjust [Diffuse color] to select color --> and adjust [Reflect color] to get reflection --> then adjust [Refract color] , but I don't know if Refract color is related to transparent or not? I tried IOR =1.0 but it didn't work...

2. I use a Standard Material instead of VaryMtl , adjust Opacity lower than 100, maybe 25, then assign both Reflection and Refraction with VrayMap in Maps . I get a totally black object again...

No matter how I tried, I got a "totally" black one or just heavy metal like?! It doesn't transparent.

[thethule]

Glass in Vray is very very simple. Just follow these instructions:

Make a Vray Material. make diffuse the colour that you want the glass to be.
Then turn fresnel reflection ON for the glass. Glass reflects more at the sides of bottles and glass etc... than at the front (same with plastic, but NOT metals). Im not 100% sure if glass adjusts the colour of the reflection (I don't think it does) so we make the reflection colour any value from black to white. White being 100% reflective. If you made it 100% red, then the reflections would be tinted red etc...
Then we go on to refraction which is what controls transparency in Vray. Black is opaque, white is 100 Transparent. BUT because the default IOR is 1.6 that means that it will refract the background. That's good in this case, but if you wanted to do say a glass window (where there is no refraction) then you would set the IOR to 1. Now the colour of the refraction will control the colour of the glass. So make it pink and it will be pink. You usually don't need to use very saturated values of the colour in the refraction. That's it really. But don't forget that refraction and reflections need something to refract and reflect. So give it a nice HDR background and lighting or a nice scene to sit in and voila, Vray glass. I would gladly give you a scene to play with but I cant upload cos I have not set up an account anywhere, but if you email me, I will send you one.

Did I explain this well? I hope so. Good luck.

Marc

[thethule]

There are a lot more advanced parameters by the way, but that is to get started on nice simple, sexy glass.

Marc

[586]

Here's a nice HDRI of a lobby for you:

http://www.dtoxx.com/lobby2_color.hdr

Here's a simple, stupid little test with it:

[RogerChen]

Thank you very much! And 586 's HDRi file.

Thanks "Marc" , You are so kind to type a lot of words to reply, step by step, explain it very clear... it surprised me, I'm much obliged to you for the kindness...

I try glass again , and this time it looks great ! Maybe I forgot to turn Fresnel Reflection On before. Besides, I understand Reflect/Reflact and IOR setting now.

I think this Forum is helpful and constructive , and many kindly people here.