Clouds clouds clouds

[lander]

Hmm, my network is acting up. Could be reason for the broken renders. No that wasn't it.

I understand that these builds are wip and don't expect them to be flawless.
Can you tell me one build where it works? Today I downloaded the latest nightly for 2016 and it's all or nothing. The clouds show in the light cache pass but gets ignored when redering. In the animation above I have frame 0-23 no clouds, 24-30 clouds, 31-40 no clouds, 41-120 clouds, 121 - 300 no clouds.

Could it be a memory issue? I have a gxt1080 and as I continued on other work I had a warning regarding memory.
Is there a way to flush th ememory on the graphics card?

[georgi.zhekov]

Seems to be working fine with a latest nightly. Can you check your memory during rendering of those frames? It's best to use a gpu monitor tool such as GPU-Z or MSI Afterburner.
If the memory is in check - can you send us the scene with a frame where there is a problem so we can check it out?

[Svetlin.Nikolov]

Note that the light cache pass runs on V-Ray CPU, even when you render with V-Ray GPU.

[lander]

I ran gpu-z and the memory is not the problem. I'll bake a zip and send it to support later tonight or tomorrow morning.
gotcha on the light cache/ CPU relation.

[lander]

Can the scene scale influence the renderer? I know that I'm on the limit of what Max can display. Very annoying but could this be the cause why it fails to render. If so then I can try and scale the scene.

[georgi.zhekov]

We can't say anything without the scene unfortunately. Send it over and we'll take a look.

Thank you,

[kostadin.petkov]

One clarification, as I think we failed to explain ourselves. The fix in in V-Ray, you need V-Ray Next nightly.
Excuse me for this miscommunication.

[lander]

Yes I got that. But thanks. I'll try to save you some time by narrowing it down over here first.

[lander]

Well I can render alot more clouds in this test scene so I think something is broken in the other one.
Oh and Environment fog and FireSmokeSim dont play nice. at least not in this version. In the envfog image there is a portion on the left where the dark cloud in the back is cut.

[ben_hamburg]

Yeah, atmospheres of different kinds don´t blend...I had this problem in on-gpu renderings, but its probably the same.
disable the environment fog atmospheric effect and instead place an empty phoenix grid around the scene, change the opacity curve to smoke and then slightly raise the left point in the curve, til you´re happy with the density. This way all atmospheres will blend correctly.
Correct me if this doesn´t work in GPU rendering.

[lander]

Why didn't I think of that? Oh right... Thanks thats a great tip. I'll run a test later.

[lander]

I think I have found two problems.
1.I can render one image but after saving the first in a sequence with the clouds I get Error: [VrayRTMax::Render] generated an exception...
The rendering is terminated. If I click render again it asks if I want to save the scene at the sam time as it shows that it's trying to render frame 99 of 99. I click no and max crash. Only the Vray log window stays up for a good two minutes before shutting down as well.
2. When the adaptive grid expands it changes the atmosphere even if the opacity is 0. see clip as the burning stones expands the grid down.
https://vimeo.com/292757937

[georgi.zhekov]

Can you send us the scenes for both of the issues?

Thank you,

[lander]

I sent the vulcano to support earlier today. No rush, just r&d. I sent the cloud scene with we transfer.

[georgi.zhekov]

Hey,

Thanks for the Cloud scene - we managed to reproduce the crash and it's already logged in our bug tracker.

It happens when you have instanced simulators in Volumetric render mode - so if you switch all the simulators to Volumetric Geometry - you should be able to render the scene.