atrium

[cristoforo]

An atrium that I am working on. Any suggestions? The brick wall in the foreground looks off....it has displacment on it...maybe it is just the current resolution?

[Candelero]

Going really good.

Crit: Looks like there are no glasses, especially on the transparent part with the white beams, etc. Need a stronger appearance there !

Best regards,
nikki Candelero

[cristoforo]

You think there should be more reflection there? At first I had more reflection, but thought that it looked wrong. If not mistaken (but I could easily be wrong!!) I thought that in reality there is not much reflection seen on the glass from inside with much light coming inside. So...following this reasoning, I lowered the reflection very much.

[Candelero]

You think there should be more reflection there? At first I had more reflection, but thought that it looked wrong. If not mistaken (but I could easily be wrong!!) I thought that in reality there is not much reflection seen on the glass from inside with much light coming inside. So...following this reasoning, I lowered the reflection very much.

All that depends on the angle you are looking at the glass, as the glass itself follows the Fresnel's laws.

Best regards,
nikki Candelero

[deflix]

looking really good.
For me I would reduce the softness in those shadows to a minimum (not perfect hard but 'just' soft), and I'd put a touch of colour in the refraction of the glass - maybe a hint of green.

[cristoforo]

Perhaps it is a stupid question, but what is the difference between putting a bit of color in the refraction and putting the color in the diffuse?

For Nikki, I tried applying a vray material with glass settings, fresnel on and reflection at max, but got pretty much the same result....almost no reflection. Perhaps I will go back to my original material (standard material with vray map in reflection slot) and increase the reflection.

[Candelero]

@ cristoforo
Use VRay material for your glass, not a standard one. will work faster.
If you want more reflections, just raise the reflection IOR more.

Best regards,
nikki Candelero

[deflix]

I would use a VRay Map in this instance.

Its a technique i use for Architectural glass. You create standard material - diff and ambient pure black and specular pure white - opacity about 2 or so.

add a vray map to the ref channel and make the ref swatch quite close to black to start with (its sensitive). To increase refs just go closer to white.

Two glass materials of this type (1 strong refs 1 weak refs) can be combined in a blend mat using a falloff map to mix em'. This works well for exterior renders - and gives lots of control over the result.

Candelero's suggestion is good too - but the reflections are not additive - and you have less control over the material.

[chicoone]

I agree with the poster in his reasoning about those reflections. They look spot on real. Maybe Vlado could pitch-in some dissertations on light transport and reflections?

Ismael

[cristoforo]

I looked through some magazines and found cases in which there was hardly any reflections and other cases in which the reflections were quite visible. So...guess it all comes down to personal preference.

[chicoone]

A magazine is not a good source to study the psychophysics of the human
eye and or the psycho that is perception. There is a rock song that went something like: "Blinded by the light..."; and cameras get blinded more than us for sure. Perception of objects through reflective mediums with a high refractive coeficient like clear glass get influenced unto the average brain by the intensity of the incident light on the reflected object vs the intensity of the incident light on the background against which the object is perceived. Take for example an interior scene at night; lights on of course, and you see reflections of objects against the dark background at a 45 degree angle. Now get a friend to shine an overwhelming spot light from the dark outside and aimed directly at your eyes. Would you still see the same reflection?

Average perception or concensus has more members vs personal perception which are the exceptions like cameras..., people that hear colors or see sounds...

Once, an aquaintance I made through forums like this repply to me "I never said I am striving for realism; I am striving for photorealism". There are three options to choose from: realism (general perceptual concensus), photorealism and artistic licence. personal choice decides which one.

Those views are my personal choice,

Ismael