Common transparency in Maxwell mat

[Zdravko Barisic]

Well, this is absolute begginers question...

The point is, HOW can I make common everyday life TRANSPARENCY material, ofcoures with Diffuse shader or some else, nevermind. I've been looking for that all night..

but nothing. I even didnt find anything about standard opacity or transparency.

Any idea? Just pure opacity, about 5-10%, nothing fancy.

 

I also tride with clipp mask in diffuse shader but it didnt help me much.

 

THANX

 

PS-its about 3dsmax7+1.2.2 BETA

[Tella]

Maxwell dielectric shader

[Zdravko Barisic]

Maxwell dielectric shader

 

Dielectric? That will kill render? isnt it?

what are common settings for simple transparency?

(again, nothing fancy, just I can see through window)

 

Thenx

[_PopArt]

Zdravo okmijun!!

 

This is one of the more 'difficult' points about maxwell. If you are using the beta, for glass, you must use the dialectric material, and it makes the image very slow and noisy - If you set the abbe number very high (above 150 for example), the glass will create a bit less noise in the scene. If you want light to pass through the glass, under maxwell render settings you have to turn the caustic layers on, because light that passes through glass is considered a caustic with maxwell. This will make the render still slower, and noiser. Transparency for non dialectric materials is done using sss (for now it can be used only with the plastic maxwell material, using the two scattering settings - apsorption and scattering). However, sss still has a lot of bugs and can cause crashes - it depends on the scene.

 

If you are using RC5 or any of the RC's, transparency is set using the attenuation distance setting, together with the ior settings (ND / Abbe). The attenuation distance specifies how deep light penetrates the material, so for glass you should use a number larger than the width or depth of the glass object to be sure that light passes through it. The Abbe number should also be set high in order to have less noise. Under render settings do the same as with the beta, turn on the caustic layers if you want light to pass through the glass. SSS is disabled in RC5.

 

If you just want to see through a window (and not let light pass through) I would recommend keeping all of the caustic layers turned off, so you can have faster and less noisy render times. At this moment transparency is a bit complicated with maxwell, it is one of its weaker points...

 

Hope it helps!

 

Do videnja!!

[Zdravko Barisic]

Hvala brate

I didnt know fot this "misunderstoodings" with transparency in MAXWELL, actually if I knew it, I would never pick up MXWLL for exterior renderings. (a lot of parts with windows).

Well I will try with 150 for glass.

Pozdrav

[Devin Johnston]

Zika, if you don't mind me asking when did you purchase Maxwell?

[AdamT]

Has this glass/transparency issue been discussed before? This is the first I've heard of it.

[AJLynn]

Has this glass/transparency issue been discussed before? This is the first I've heard of it.

 

I think I heard something about this a while back, some people being real annoyances on their forums about some silly "light passing through glass is almost completely broken" issue that will surely be resolved by Maxwell version 2.0 - all they need to do is completely rewrite the technology again

 

But yeah, "simple" transparency, transparent shadows, and looking through a window at an interior that is lit by sun passing through glass are all impossible in Maxwell.

[_PopArt]

its a useless 'feature' anyway:p

[ki_cz]

I think I heard something about this a while back, some people being real annoyances on their forums about some silly "light passing through glass is almost completely broken" issue that will surely be resolved by Maxwell version 2.0 - all they need to do is completely rewrite the technology again

But yeah, "simple" transparency, transparent shadows, and looking through a window at an interior that is lit by sun passing through glass are all impossible in Maxwell.

 

I think the problem is that light passing through glass isn't actually physically correct. What happens is that what we are looking at in real life is an illusion. The glass in windows is being removed/replaced 100000s of times per second, that way, it only looks as though the light is passing through the glass.

 

Also, have you noticed that when you look at a building with the "reflective glass" on the outside that you can't see inside? Well, this is because this is physically correct glass, this is what maxwell can do. Unfortunately, the kind of glass that is very transparent does not exist in the physical domain (see explanation above, it is actually glass that is being removed/replaced very quickly) so therefore maxwell cannot render it. If you were to render an animation on the other hand with 100000 frames per second, I can guarantee that you would get a perfectly noise-free room, because then it would be physically accurate.

[Devin Johnston]

I think the problem is that light passing through glass isn't actually physically correct. What happens is that what we are looking at in real life is an illusion. The glass in windows is being removed/replaced 100000s of times per second, that way, it only looks as though the light is passing through the glass.

Also, have you noticed that when you look at a building with the "reflective glass" on the outside that you can't see inside? Well, this is because this is physically correct glass, this is what maxwell can do. Unfortunately, the kind of glass that is very transparent does not exist in the physical domain (see explanation above, it is actually glass that is being removed/replaced very quickly) so therefore maxwell cannot render it. If you were to render an animation on the other hand with 100000 frames per second, I can guarantee that you would get a perfectly noise-free room, because then it would be physically accurate.

I'm not sure if you’re joking or being serious but I think your explanation is flawed in that although light does vibrate at rates of 400 million million times a second, it is for all intents and purposes constant. I'm also not sure what you’re talking about when you say that light passing through glass isn't physically correct and that it's an illusion. Light does pass through glass, it's an observable phenomenon.

As far as not being able to see through glass that depends on the percent of reflective coating on the glass. Here is an example of glass that is quite obviously see through in the daytime:

http://www.birdsandbuildings.org/design/allglass1.jpg

The argument that Maxwell is physically correct as it is and that's why you can't see through glass is just an excuse, even NL has admitted that glass in this situation doesn’t work properly.

[AJLynn]

I think the problem is that light passing through glass isn't actually physically correct. What happens is that what we are looking at in real life is an illusion. The glass in windows is being removed/replaced 100000s of times per second, that way, it only looks as though the light is passing through the glass.

Also, have you noticed that when you look at a building with the "reflective glass" on the outside that you can't see inside? Well, this is because this is physically correct glass, this is what maxwell can do. Unfortunately, the kind of glass that is very transparent does not exist in the physical domain (see explanation above, it is actually glass that is being removed/replaced very quickly) so therefore maxwell cannot render it. If you were to render an animation on the other hand with 100000 frames per second, I can guarantee that you would get a perfectly noise-free room, because then it would be physically accurate.

 

This is not correct. In Maxwell, caustics can not be seen in reflection or through a transparent surface - this is a well documented flaw, I've posted tests here and in the NL forum that clearly demonstrate this. See: http://www.maxwellrender.com/forum/viewtopic.php?t=10787&postdays=0&postorder=asc&start=0

[ki_cz]

My post was obviously a joke you guys, there's no way magical monkeys are removing/replacing windows every 1/1000000th of a second ... I guess I forgot to put in the magical monkeys part of my crazy theory.

 

I was simply trying to come up with something equally as absurd as maxwell claiming to be physically accurate, when it can't even render sunlight through glass properly ... or reflected caustics ... etc ...

[Devin Johnston]

Thanks for clearing that up, I thought you were another crazy Maxwell fanboy.

[AJLynn]

I thought the bit about the monkeys was a way of saying all non-Maxwell renders are crap

[noseman]

Seriously now,

you mean there are no invisible crazy monkeys?

 

Oh my god! I was fooled!

[AJLynn]

An infinite number of monkeys with an infinite number of PCs will eventually make a Maxwell render converge. This is the new technology for RS2 - but there's a 6-month lead time on getting the monkeys their cubicles.