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Something is off...

19hours ?!!!!! man ,,, something is definetly off!!::

Dude...chill.

Something is definitely off.

First of all... That camera angle doesnt help If you are planning on seeing through the water.

The noise modifier on that water is way to high! (Not that it maters all that much) But it just doesnt look natural...

Try adding something at the bottom of the tank, something to be seen Maybe a ruber ball or a torus knot emitter

Have you got all caustic layers turned on? Is your geometry as clean as posible? What are your sky settings? Meaning... Are you using physical sky + sunlight ? Are you using skydome? None of those and just a plane emitter?

Check your scene scale, and emitter geometry

Aaaahhhh... I think I understand what you are trying to achieve. Something like light rays through a foggy enviroment.

You can see rays of light through water because natural water is never 100% free of particles in suspention... Dust, plankton, sand. Light enters the fluid hits one of those diminute particles and lights it up.

Hence you see it! Having a huge amount of small particles in suspention tends to look as if the actual ray of light was visible yet you are only seeing the reflected light of the particles.

Since maxwells dielectric material considers a 100% pure enviroment, you will not see rays of light

You would need to apply a fog volume to the water to achieve that look, but they are temporaly out of service, wait till the october release

Ok... What is mean is this: You will NOT see those rays of light with maxwell´s current version.

It is not a question of sample level, this feature is not yet available

Model a 4 sided sphere and scale it to be really small... As small as a grain of sand and apply a diffuse material.

Place it on the interior of the liquid and then copy it a couple hundred of times, hence creating a small cloud of very small particles...

If you render it again like this, you will see the ray of light.

maxwell05 wrote:I not understand vewry well... can you post an example...

I try it...


thank you very much...

:: live it friend... have a look at what happens in the real world and you will understand why you get that effect. It is normaly to do with sediment in the water.. ::

Nice image and render so far.

I think the reason you cannot see the strength of the sunlight down into the medium of water is from two things.

(1) Because Maxwell Render is physical render engine, you water must be modeled just as it would be in physical space. So if this is a box container with a volume of water. Then this is how maxwell render thinks when looking at you scene.

Maxwell see light hit the water plane surface and calculates it according to your settings for that dielectric, but for light to bend, or refract it has to hit another surface of some type.

So Maxwell sees the light hit the water plane surface but it never again encounter a second surface that lets it finish the calculation of the light transmission through the water because the next surface it hits is your box.

I would add another surface for you water and see how that develops.

(2) I would set your iso much higher and your fstop much higher to increase the strenght of the light transmissions- we may catch more of the type of caustics you are look for.

Hope that helps! I did not want to get more technical on the topic of light interaction with Maxwell because there is very lengthy thread on the concept using a glass and liquid as example that was discussed in the main forum in detail.

ref: http://www.maxwellrender.com/forum/view ... ass+liquid