how s that posible to achive this in vray?

[th_clubber]

hi guys...

i ve been wandering around in the city i live in and i took a picture of one of the buildings that i wanna do the same in vray...

whatever i do i cant make it like that...what kind of material should be used?or is it also related with the environment around?

[Tim Saunders]

You going to post an image?

[th_clubber]

sorry from all...here s the picture

[Ricardo Eloy]

Too small, dude.

[th_clubber]

allright,here i resized it...i hope this ll be useful..

[alias_marks]

I've always been interested in techniques on how to create this kind of reflection in glass too. Since no glass is exactly flat there's always a bit of distortion that I've noticed, espically on tall sky scrapers, it's definitely not a mirror reflection.

 

I'd be interested to hear some techniques used out there. Use Noise in the bump map?

[Brian Cassil]

Pretty simple really. Just add a little bit of noise in the bump slot.

[th_clubber]

well, dunno if theres anyone in the business but those r tempered glasses and during the process as i m told the glass becomes non-flat after it has been tempered...thats why the reflections r not like they r in a mirror...is ther any other way than bump+noise...i mean is that how its done?

[Koper]

but your glass then should be all one object, otherwise you get the same kind of dent on each panel.

 

you also could model it with a noise mod. and then change the seed for each panel

[Brian Cassil]

I always try to model the glass with as few panels as possible anyway.

If you do have individual panels then you could add a UVW mod to it and change the noise map to explicet XYZ or even create a custom bitmap for the warping.

[martincg]

Pretty simple really. Just add a little bit of noise in the bump slot.

 

i am using this method too

[Nic H]

I have done this before and modelled each glass panel (single faces) then made a few quick custom bump maps in photoshop using gradients and noise maps so it bulged and had a bit of ripple.

 

Then arranged into the same ratio/size as the glass panels and used planar mapping over the whole object.

 

You could alternatively use 1 map and use 'per face' mapping with a UVW modifier.

 

It will only start to look convincing once you have a good environment to reflect though, I used geometry ground and near models supplemented by a hemisphere with sky and background image on it, with output bumped up a bit to accentuate the reflections.

[alias_marks]

any chance we could grab a look at what some of these techniques look like?

[jophus14]

I have done this before by creating a few boxes that i use for the panes and then adding a noise bump map to each pane with different settings. I then made instances of each pane and placed then in the curtain wall in a different order. When you render the scene out with an environment or HDR image you should get pretty good results.

[Devin Johnston]

any chance we could grab a look at what some of these techniques look like?

 

 

Just add noise to your bump map channel and you'll be done, honestly this is one of the easiest things to reproduce although nicnic is right you need to have an environment to reflect in order to make it look correct.