window glass material

[alief1]

Hi i have problem to make a pure transparent glass with good reflection . i tried

Diffuse color: Black

Reflect color: light grey

Refract Color: white and I use different IOR from 1.1 , 1.2,1.3 ,and 1.6 .

I have 2 problem

1- i cant get the good reflection same as this pic

2- the object behind my glass show same az magnifier I know this is because of IOR .

this is my render and i mention that problem with red . pls help me .

[salvador]

reflection color to white. Increase Fresnel. IOR 1.56

[Scott Schroeder]

Your comparing two vastly different glasses. The reference glass is tinted dark, while your glass is crystal clear. The tinted glass, obviously, will show reflections much better. Make sure you actually have something to reflect in your glass behind your camera or you are using a well defined environment map (or both).

 

To top it off, the reference image may have had some Photoshop magic done to further enhance the reflections. Nothing wrong with it and you may want to consider it as well if you just can't get the render to look right. Photoshop is much faster to add in subtle glass reflections than tweak-render-tweak-render-tweak-rinse-wash-repeat.

[heni30]

15 minutes in PS with a googled "backyard".

 

Because it's a Photoshop layer you can control darkness, contrast and opacity of reflection.

Edited March 22, 2013 by heni30

[Chris MacDonald]

As stated, the reference glass is tinted. Glass absorbs a small amount of light, reflects a small amount of light (depending on viewing angle, fresnel reflections) and refracts the remainder.

 

Firstly your geometry needs to be 3D, not a flat plane; this will cause the "magnification", or refraction that you see. If the geometry is 3D the light will be bent back to its original trajectory on its exit of the material.

 

The basic material setup would be something like an IOR of 1.6 and pure white refraction AND reflection with fresnel reflections ticked. Add a tint/absorbtion in the fog colour to simulate real glass. Keep in mind the glass will actually need something to reflect to look anything like that photo.

[Ismael]

"At night, when it is dark outside and you are standing in a brightly lit room, it is easy to see your reflection in a window. During the day it is not so easy. If we assume that the room is brightly lit by the same amount in both cases, then the light reflected from the window is the same during the day as it is at night. However, during the day, light is coming through the window from the outside. In addition to the reflection, the observer also sees the light that is refracted through the window from the outside. The light from the outside is so intense that it obscures the reflection in the glass."

 

Source:

http://instruct.westvalley.edu/epperson/Fall05/phys2b/solutions/

 

Chapter 26 Conceptual Questions DOC

 

In the reference image at the start of the discussion, the camera (viewer) is outside rather but the same principles follow. The inside being less lit than the outside makes for very strong reflections of the brightly lit exterior on the glass.

[bilderbaurendering]

Hi Ali, first gave your glass some thickness (for example 4mm) -do not use simple plane. Second, as in real windows you have two

or three layers of glass. Do the same in the model (here is some random detail http://jkinteriordesign.co.uk/windows/Window-Cross-Section-1.jpg)

 

hope it helps

 

bb

[notamondayfan]

I find the appearance of glass is more down to lighting and what is actually been seen in the reflection, rather than the glass material itself. In your image, you are in a brightly lit scene, looking through the glass at a well lit area, so you wouldn't expect to see strong reflections in instances like this.

 

If I were you I would find a reference image closer to your scene, and try to emulate that, than get frustrated trying to use a reference image that is nothing like your scene.

 

Dean

[alief1]

thanks so much all .