water feature / waterfall

[peterguthrie]

Peter is there any chance of trying the horrible thing of importing the mesh into your scene? Since vray proxy is more of a get out of jail card for high memory scenes and not the best choice for performance can you bring a mesh in?

i'll post an image soon John, pretty happy with how vray is dealing with abc files actually! was more just the material i was interested in optimizing (turning off reflections, other ways of optimizing speed like that)

[peterguthrie]

I've never used krakatoa or anything like that, so not familiar with materials for foam/spray for example

[peterguthrie]

ignore the quality of the simulation, it is looking much much better in a recent test but this is an old one for testing purposes. I'm just wondering what sort of material to give this since I have no experience whatsoever with rendering particles.

I saw in 3.00.06 there is an option to render vrmesh particles as points OR spheres, and also a new vraypointparticlemtl . A quick test attached with a basic grey material. There are very limited options on the vraypointparticlemtl shader.., will there be additions or am i just not understanding how to use it?



if i turn on reflections and refractions the render time goes crazy on spheres mode (several hours), but on points mode its still really quick:



I'm guessing i would need normals info stored in the proxy file to have more control over how the material looks is that right?

[jacksc02]

Peter,
I am just finishing up a massive job, but I reckon phoenix would do a nice job of this so I will have a play with a few things and report back

[peterguthrie]

Hi Chris, i'm just looking for ideas on the materials.. all the sim work is done (and looks pretty amazing - because someone else did it )

[jacksc02]

I realise the sim work is done. I just want to try it in Phoenix to compare the results

[peterguthrie]

cool, would be very interesting, pm me if you want the base geometry

[joconnell]

Is it mainly foamy stuff in the water or is there any "wall" as such? A lot of the time people will do things like map the speed of the particles to it's colour (should be able to use a vertex colour map to access it) or use the churn / vorticity to do something similar.

[peterguthrie]

just foamy stuff.

so faster moving particles would be brighter perhaps?

[joconnell]

For foamy stuff, brandon davis back in the 90's used to use cubes as his particles spinning randomly with a white material and broad specular on it to catch lots of hits of light. For foam yeah you normally do a black and white ramp or a blue to white ramp based on speed or vorticity, depending on which you have the options of!

[peterguthrie]

vlado, the vrmesh/abc rendering particles as points stuff is all awesome! and the vraypointparticlemtl is really really fast and mostly perfect for my needs. would it be really difficult/slow to add some kind of basic reflections in? probably i can live without it, just wondering!

[Dariusz Makowski (Dadal)]

I dont know why and hate me for it but that looks to me like curtain :/

In my eyes there is not enought refraciton/distortions off whats behind the water. Atm it looks like thin curtain...

[peterguthrie]

I dont know why and hate me for it but that looks to me like curtain :/

In my eyes there is not enought refraciton/distortions off whats behind the water. Atm it looks like thin curtain...

no worries good to get feedback! the dusk one esp is quite heavily motion blurred. I'm going to make the granite behind the particles look wetter/shinier, but not sure what i can do re: refractions

wondering about actually reducing the number of particles and making the particle size slightly bigger.