water

[Ros. Riha]

what is todays state of affairs?

I need to have nice water:

On one hand, I think of caustics, on the other I would like to use SSS - but it was said these two do not go along well - what approach to employ?

 

[Marc Chaumier]

Wind on little surfaces, produce these wrinkles. If you look closer, you will see that the surface of the water is not so agitated, only very little waves, but what is interesting, is the lightplay, and refractionplay that I have noticed in the pools water. I say one more time, it's not the same for a big volume of water.

My solution is not perfect, but it goes in the direction of the case I use.

[akinlolu olugboji]

The effect i must say I love too. And will try and reproduce too.

[Kevin Lockwood]

I agree. I live in Palm Springs, CA. US. Here, nearly every home has a swimming pool. I think when we see a photo of a pool and caustics are in play, we see what appears as lots of motion, but that is really just the caustics "dancing" on the bottom of the pool and not necessarily at the surface.

THIS is a typical calm water pool. Once you add in something that effects the water like a FOUNTAIN or SWIMMERS, then the water will start to undulate and cause surface ripples and waves. Wind will move the water also. I believe THIS is typical wind motion.

[Ros. Riha]

Kevin, thank you very much for photos - they really help to focus... for instance, the water does not look that transparent as we all seem to model it

attached, there is an attempt combining wrinkle(small scale)+rubble(big scale)

[Marc Chaumier]

When I look closer, it seems that rubble has several level of waves (bigs and littles), it's what I see when i look at the oceans water. But I can't obtain the light effects I'm searching, like on the photo I've posted above. Sometime, these effects are visible, dancing on the walls and ceilings near the pool, by low ambient luminosity... You see what I mean?

[Ros. Riha]

please find attached result of my attempts so forth 230 passes, sun+hdri sky - water modeled as solid, tagged as caustics, material definition attached (units=mm)

 

...how is your water modeled, Marc? Is it solid, or face?

• I am interested how much will the pool material itself affect the result
• I am also thinking of overlaying two bumps - small scale sandpaper + big scale rubble... that might help, what do you think?

Other suggestions?

 

 

[Marc Chaumier]

Nice, but I can't recognize the caustics. My water is modeled as a region. I copy the superior face of the internal volume of the pool before the boolean operation, 20 or 30 cm under the floor level. I tag it as caustic, and not thin. I've tried to mix 2 different bumps, but it is difficult to master the effects. In my case, I need very simple waves; and the rubble integer several level of waves, and as you can see in your picture, it's perfect for big volume of water. It's like harmonics in sinusoids, big waves which carry little waves. In pool, most of the time, we need only light wrinkles, to not produce storm in a glass of water ;o)

Try to do the water like I said above, just one face, the superior face of the volume which you want to subtract.

[Ros. Riha]

face or solid:

compare attached - first is the solid one (it ran for some 260 passes), second is the 3Dface one (it ran only for some 40 passes). Material definition is almost the same as posted before, only less transparency and less IOR (next time I am going to try your bump, Marc).

To my eyes, there is no difference between the two - or do you see something?

Speedwise it seems 3Dface runs faster, but it is difficult to say, as there are other changes to the model too.

 

[Ros. Riha]

1st sandpaper attempt... does not seem to do the trick, but maybe the scale is too big... material definition attached...any suggestions?

[George Ioannidis]

Hi Ros,

here is my attempt quite happy with the result.

[George Ioannidis]

After a few tunings I've got this. It looks like water in the pool. Saved with materials for future use/

[akinlolu olugboji]

Mind sharing the material? Love this.