Real looking glass (yes, again)

[grantwarwick]

Why not spend the time to get a water shader in vray too? I think it could be extremely useful and time saving for all those moments where I don't have an extra 4 seconds.

[LarsSonparsson]

Why not spend the time to get a water shader in vray too? I think it could be extremely useful and time saving for all those moments where I don't have an extra 4 seconds.

I'm not saying that there should be any Glass shader, just trying to find the reason why someone thinks so. Like you said, in 4 seconds you can create your own Glass material and save it as a preset and there you go. No need to do that again later on. I think that because other render engines has some "special" glass shader, that is the reason people think Vray should have it also. They just dont realize, that there isn't any special tricks going on. It's just a standard material with few basic properties in right values.

[pengo]

Quality Glass is possible with VRay since beta versions, even without so stressed work sometimes. And what is done in those images are not the best glasses can be realized for sure.
http://img.archiexpo.it/images_ae/ph...28-4217707.jpg
http://www.archinfo.it/01NET/Photo_L...10_420x270.jpg
http://img.archiexpo.it/images_ae/ph...28-4217811.jpg
http://img.archiexpo.it/images_ae/ph...28-4217857.jpg
http://www.arredamento.it/images/568...cale-anima.jpg
http://www.edilportale.com/upload/pr...c796f701f7.jpg
http://www.edilportale.com/Upload/20515_01.jpg
http://www.faraone.it/cms/resize.php?maxx=623&i=37
http://www.edilportale.com/upload/pr...141c59b208.jpg
The only thing I'd ask to Vlado and all ChaosGroup faster glossies reflections/refractions calculations .

[Macker]

I just got back from a short holiday in France to find this storm in a teacup thread.

Lupaz, you're a few sandwiches short of a picnic mate. All the evidence in this thread suggests that you don't actually know much about what you're talking about and are just making wild generalizations about render engines. Photoreal glass is by far the easiest material to create; please do have a word with yourself.

[Olli96]

Wow, this thread is....intresting....
since most important things about Vray glass has been said allready i can only add that if you dont have those seconds to setup your own glass or to create your own material library then you could buy this product: http://www.sigershop.eu/index.php?op...=31&Itemid=168 - there you have 100+ glass presets for only 140€

[pengo]

For my experience even if u have a glass that worked fine in a scene/context in another scene is not sure that will work as well. So every time relating to the context the glass material will need number of tests to refine it. So in absolute a library not helps to give results as expected in only one shot.
Would be better simply to understand how to setup a base glass and how to variate its parameters to adapt it to the reflected context scene. Someone in previous pages, gaves base parameters to realize a glass.

[Macker]

To be honest, my glass works perfectly every time, without tweaking.

[Lupaz]

Hi Pengo, Those are very nice renderings.
Do you think you can share the settings for that glass?
Are the steps just one element/material or are you splitting the material for the edges?
Do you change the options in "options" in the vrayMtl?
thanks much.

[PIXELBOX_SRO]

Come on Guido!
If you have read this thread in depth, you shoudl by now have all the info you need to have to create such glass by yourself.
Youre pushing it a bit too far by now.

Why dont you do some test yourself and then come back with them here and we can all help you out if youre still not happy.
So far you havent showed any effort in this way, only focusing on writing wont get you anywhere close to what youre trying to "prove" here.
Please be reasonable ...is it so much to ask really ?

[Lupaz]

Actually pixelboy,

I'm gonna learn C++ and .net and how to use the vray SDK and start making my own plugins, the first of which will be glass material.
It'll take me about a year, but what can we do, right?

In case anyone is interested, the glass will have the following by default and then a couple of sliders for fog color/intensity and maybe something else like noise level.

-Diff color black
-full reflection with fresnel curve
-affect all channels
-affect shadows
-98% refraction?
-fog color x or y (what ever)
-fog multiplier x or y
-cutoff 0,001
-double sided
-reflect on backside ON
-I'll experiment in what way the material is affected by the irradiance pass to see if "use irradiance map" does anything at all
-I'll add a slight parametric noise as a bump map
-I'll try to get photon mapping caustics for reflection and refraction. This would replace "affect shadows".
-Maybe some tests with the BRDF

If you Pengo want to share other settings, that would be great, cause your glass seems to be the only one I've seen so far that looks almost real.
I'll send you the plugin once I get it to work if you are interested.

[Neilg]

or just make a maxstart file with a bunch of materials in like a normal human being.

[glorybound]

That's what I was thinking I use the VRayMtl Utilities for some materials, including glass.

or just make a maxstart file with a bunch of materials in like a normal human being.

[pengo]

I didn't split the geometry or material in two parts, never i did it. About the material I could share the material settings but I'm sure You (but meaning in general) could not use it as it is, because as I wrote, the result of a good glass depends on the reflections too. The first thing is too set a good fog color HUE about 98/118 SAT, about 89/118, Value about 89/118 too, fog multiplier 0,05 but more often 0,007, depends on the scene scale, depends on the thickness of the glass too. For the rest diffuse color black, reflections color to white even if here too i change a lot from 255 to a lot less like 190 or 160, depending on the scene context. refraction not always pure white. Always needs the glass a high number for the depth, in me 12 is one of the best value for depth reflections and refractions. Check reflect on the back side in options rollout and u should get a decent glass. Then I'd add a noise in bump but with a low low value to reproduce the common irregularity for the reflections. To get more realistic glass I'd give the glossies reflections something like 0,98. But the rendertimes will grow up a lot. I hope u will test those parameters and u will tweak a little even with IOR value to get the right amount of reflections specially for the bluish glass common in exteriors facade, there u will need to change the reflection color too, to get the exact result.

[Lupaz]

Wow dude. thanks pengo!

Cubiclegangser: Exactly, I won't be a normal human being. I'll be a developer.
The same way I had to learn maxscript because autodesk wasn't giving us the most basic tools to make life easier. (thanks Scriptspot BTW!)

And thank you chaos group for not kicking me out of the forum, seriously.

[pengo]

Prego Guido
Spero di essere stato utile.
Sono italiano anche io