VrayEnvFog additions

[anchovy]

Vlado-

I know I had chatted with you about adding an absorption color.



But Im also wondering about additional shaping controls as pointed out in last years Siggraph presentation

http://magnuswrenninge.com/content/p...entals2011.pdf



Im also wondering about reading in volume data without going to Krakatoa.

http://www.blender.org/development/r...ume-rendering/

Right now we are doing a bunch of medical imagery that would really benefit for these additions.

Thanks!

-Michael

Besides everyone likes fuzzy bunnies.

[henning]

I want to support these wishes!
Also it would be good if there was an atmospheric effect that simply acts as a container for any number of different volumetrically shaded objects. Right now for example we want to render Fog and Phoenix at the same time but they aren't blended together correctly it seems. Ideally it would support third party effects like Ozone for example and blend them together properly.
I just started using Phoenix a few days ago and I'm really excited about what could be possible with volumetric shading in vray!

[anchovy]

I want to support these wishes!
Also it would be good if there was an atmospheric effect that simply acts as a container for any number of different volumetrically shaded objects. Right now for example we want to render Fog and Phoenix at the same time but they aren't blended together correctly it seems. Ideally it would support third party effects like Ozone for example and blend them together properly.
I just started using Phoenix a few days ago and I'm really excited about what could be possible with volumetric shading in vray!

Sounds like a good addition. I see stuff like this and think, FUN!

http://mattebb.com/weblog/medical-voxel-data/

http://vimeo.com/5505801#

-Michael

[Macker]

This would be a fantastic addition. To be able to simulate things such as sponge, and bread; with all their air pockets would be fantastic. I know Pixar managed to impliment something similar (Volumetric Hypertextures?) in Renderman.

[Swahn_Kung]

Shaping control of volumetric effects? YES!

As you probably remember Vlado I was experimenting doing more complex cloud shapes using customized meshs as gizmos some time ago.
I was trying to give it that dense "pyroclastic" look and it worked fairly well, except one crucial thing; deforming the meshes using various noise and push modifiers sometimes pushed faces through each other, revealing backfacing.
This produced holes in the volumetric effect and getting rid of the overlapping faces was hard to do on a parametric mesh, and to retain the "puffyness" of the clouds at the same time.

Even though I'm not so technically involved in the method I would definitely find various displacement effects useful on the volumetric level. Because it would mean fine displacement details would not longer be dependant on the mesh itself.
It would be quite handy being able to shape the overall shape of the volumetric effect using a simple lowres mesh, and then let volumetric displacement add the detail.

At this point you cannot get a nice "pyroclastic" look by just using one gizmo and some noise map applied to the volume density. In such case you need to use two environmental fog nodes, one with the noise and the other one without, and then apply it to a quite high res mesh. I believe the idea of adding various shaping controls to the volumetric effect, such as displacement, will get rid of all these unnecessary steps required to achieve a similar effect using highres meshes and multiple fog nodes.
It would just require one node and one mesh, which is much easier to control!

Highly appreciated if you ever decide to implement such functions into Vray.

[henning]

Shaping control of volumetric effects? YES!
Even though I'm not so technically involved in the method I would definitely find various displacement effects useful on the volumetric level. Because it would mean fine displacement details would not longer be dependant on the mesh itself.
It would be quite handy being able to shape the overall shape of the volumetric effect using a simple lowres mesh, and then let volumetric displacement add the detail.

You can do this with Phoenix FD. There's a sample file somewhere in the forums. Search for "clouds"

[Dariusz Makowski (Dadal)]

+ maya tooo plz

[Swahn_Kung]

You can do this with Phoenix FD. There's a sample file somewhere in the forums. Search for "clouds"

I'm sure you can, but I still think it would make a good addition to Vray. If it's relatively easy to implement I think it would be worth it.

[anchovy]

Vlado-

Any word on any of these wishes? I was looking at the nightly build and it looks like we have some new toys but not absorption color, colored shadows or shaping controls.

Also I think the gizmo falloff radius may be broken. Or perhaps Im out to lunch. Edit... Looks like its in the fadeout sorry missed that. you might want to have the per gizmo fadeout disable by default.

Thanks

-Michael

P.S. I know you can get color in the shadows if you rais the scatter bounces to more than 1 but It would be nice to see transmission by default.

[alexyork]

Can I make 1 additional request for VrayEnvFog - The ability to use negative values for the Fog Height e.g. -100. This would be hugely useful when trying to add layer(s) of fog in a valley space, for example, that sits below 0. Had this on a project recently and was forced to either move the entire model down so that the fog could sit at 0 height or just fudge the fog in post, which is what I ended up doing.

[vlado]

Can I make 1 additional request for VrayEnvFog - The ability to use negative values for the Fog Height e.g. -100.

Yes, good point You can set it to anything you want from MaxScript though.

Best regards,
Vlado

[alexyork]

Yes, good point You can set it to anything you want from MaxScript though.

Best regards,
Vlado

Ah, how is this done? Would be very useful.

[vlado]

I've already enabled negative height for the next service pack anyways

Best regards,
Vlado

[anchovy]

Vlado-

Any thoughts on the other items?

Thanks

-Michael

[alexyork]

I've already enabled negative height for the next service pack anyways

Best regards,
Vlado

Great news!