I don't know if it is the new daily built but sometimes my textures doesn't appear in the render… But they are visibles in the viewport, and my shaders are assigned. And since the last daily built, I have to increase my light intensity, instead of 0.82 for example I have to put 10 or 20 (or more). I think that it was something like a decay, added in the last daily built, because I didn't touch anything (except the sampling, but I doesn't change the intensity).

Sorry Lari you fell on someone without any luck

Edit : sorry I meant “production built” instead of “daily built” (I'm on the 12.5.376)
Edit 2 : ooooh… when disabling the display button on my dop network, my textures seem to appear in the render…

https://vimeo.com/64981725 [vimeo.com]

Done !

I know that I can make better, but I notice that the best way to learn a software is to make little projects like this one (and tutorials, of course). So I want to do some other tests I could of add a wet map, splashes, foam, etc. But I didn't wanted to stay to much time on this.

And again thanks for you help !

That's looking good!
Definitely White water (foam, and splashes) and wet map would have added much more details and realism!

Great work! Keep it up!

Thanks Lari !
Next time : foam, splashes and wet map for sure !

Is there always foam when there is water ? I mean there is foam when there is a strong velocity, but does all waters generate foam ?

Usually you would find “foam” where the surface tension of the water becomes really weak letting air settling in the surface!

This is caused mainly (but not only) by the agitation or velocity changes of the water. (Hope I still remember my physics and I'm not talking nonsense!)

If you look at water references ( Waves splashes, waterfalls, strong stream lakes or even water colliding on objects) you can see the natural effect of foam or white water… foam is a bit different since there is another natural component to it… maybe you want to google that part!

Lewul
Is there always foam when there is water ? I mean there is foam when there is a strong velocity, but does all waters generate foam ?

If there's laminar (smooth) flow, there usually won't be foam, unless it was there to begin with. However, when you have water and air mixing turbulently, or if you have extremely turbulent water flow (e.g. from a poorly-designed submarine propeller), you'll usually get bubbles.

Since your scene seems to have many droplets and splashes of water leaving the main flow into the air and then falling back in, there'd probably be bubbles created in real life. If it's intended to be scummy water in the pipe, there'd probably be bubbles to begin with.

Okay I see. I'm always thinking that sea water = more foam because of salt. So for me there is always less foam in “normal” fluid…
Thanks !