Exterior glazing reflections

[gazbo]

Hey all,

 

I'm doing some exterior massing views for several large buildings. My views will all be aerial from quite a distance. I wanted the glass to be opaque but still render reflections of surrounding buildings and the sky. I'm using MR sun and sky with final gather and the MR physical sky as environment.

 

The material for the glass is arch & design glass thin wall, with the transparency set to 0 (interior is not modelled). The attachement shows the render which has no discernable reflections, any clues??? Or if anyone knows a better way of going about this please enlighten me, I've tried using HDRI's but am getting similar results.

 

Cheers

 

Gazbo

[afterglow]

um.. you're looking down at it, how are you going to see a sky reflection?

[jophus14]

Completely true, your glass will reflect the ground from this camera angle. If you want, in post production you can add a gradient or mask to the window panes to give it that ground-to-sky transition effect.

[gazbo]

Good point, well made.

 

But by that rationalle there should be white reflections of the floor material?? Not just black like I'm getting? Also even when I'm looking up at the building no reflections??

[jophus14]

It depends on the reflection/refraction of the glass. If the glass is transparent then you will see the inside of your building. The same way that if it reflection is ligth grey or white then you will see the ground. If you don't have any lights on the inside and your glass is transparent, then the glass will be darker/black.

 

Do you have the Affect Shadows and Affect Alpha ticked for your glass material? Are you using Fresnel Reflections?

[gazbo]

I am using fresnel reflections, the transparency is set to 0, I thought that would just get me a mirror-like glass which would be fine but instead it is black, no reflections of the ground or other buildings.

[Justin Hunt]

What are your Max reflection settings? also turn an backface cull and turn on Thin wall surfaces in the advanced rendering option tab.

 

You could also drop the MEphysical sky shader into the environment slot with a bitmap in the custon backround slot.

 

JHV

[fahtal]

i deffintly see reflections in your glass.(the green building inthe middle has a diagonal reflection of teh building infront of it)

 

but the reflections aren`t the exciting.

 

what you can do to make the glas not black. is first turn it of when you make a FG pas(save the fg map) and then turn the glass on and render withe the fg map loaded.

 

now it shouldn`t be black inside.

 

if you want to make the reflections more exciting may put an bitmap on the reflection or difuse sllt the fake it. or make it les transparent and bleu...

 

goodluck

[gazbo]

Thanks for the tips all. Think in a lot of ways I was expecting too much of the scene. There just wasn't much for it to reflect and the distance of the glass from the camera was pretty huge. I ended up going for a bit more of a stylised rather than realistic image which suited the purpose just fine.

 

Did learn some stuff on the way though, so cheers.

 

Gareth

[envo]

Hi all, I am new at Mental ray. Can any one give me tips/settings

that will help me achieve exterior glazing that is reflective and

photo realistic?

[NeWAcEiN]

hello Folks i m faceing the same issues i tried many settings with various types of glass mats now will try thin geometry type

and as far as the refl/refra is reffered use BRDF its reallty good. and one more thing is one must setup good enviroment like grass mountains trees buildings cutouts etc. will help in glass reflections

 

cheers!!!!

[NeWAcEiN]

hello folks, i am also working on exterior buiding proj. which is 10 story tall and have full glazing i ve tried all glasses but unable to get the result required by the client

i googled and downloaded many images which has glazing effect but unfortunately autodesk has failed to deliver such material in max which has same effect enviroment is secondery thing but glass dosent look like it has to

now doing R&D for it. such a time consuming method at this time. or at least autodesk show us the way to do it. kindaa tutorial or something similer!!!!!!!!

Cheers!!!

[NeWAcEiN]

try using mirror material insted of glass !!!!

[NeWAcEiN]

here is the drill

1. the glazing is mainly the glass material

2. so if u need such effect uhave to model it so (like all glass and its joints)

3. each glass must be single polygon obj

4. then use mrA&D with solid glass preset

5. dosent work on single plane/box and cuts n them

6 take u r time to think where n how glazing will appear

7 some time elevation is more demanding

 

i have tried some materials mrA&D's solid glass preset works well

cheers!!!!!!!!!!!!!!!!!