Foam and splashes no longer render outside the phoenix container.

[JD3D_CGI]

I don't recall changing any options, and it was working before, but for some reason the foam and splash isn't rendering outside the container.

If I turn the particle shader to 'render as geometry' it starts to render outside the sim container, but then crashes.

What are soem causes to not render the foam outside the container?

Could it have anythign to do with lightcache or brute force?

[George Barzinski]

Hi,

would you please tell us which Phoenix ver. do you use? My second question: Is there an underwater plane or not? And it would be great If you send us a scene + cache file to investigate this issue further.

[JD3D_CGI]

Hmm, no need to investigate. The suggestion to put a ground plane back in did work. Not sure why.

I took it out because of an other issue with the infinite plane, but I did not know that affected the foam rendering. But it does.

But a a plane with a render time scale works OK too, and doesn't seem to have the same horizon problem,

[Svetlin.Nikolov]

It's really important to catch the crash though - if you still have the crashing scene, it would really help.

Cheers!

[JD3D_CGI]

OK, I can send it, the only prpblem is it obviously has a humongous amount of cache - what is the best way to work with that when I upload?

I noticed that the scene is rendering the ocean differently across Intel and AMD processors, and also, on another machien with Intel, it's not even rendering - throwing up some error:

see attached

[Svetlin.Nikolov]

Ouch, that is a crash as well. We have an FTP you can use to upload stuff that is either large or under NDA - please drop me a mail at my username at chaosgroup.com and I'll send you the FTP credentials - and you can use FileZilla or any other FTP client to upload. Only 1 cache file from the frame where it crashes would be enough for us to reproduce it here.

Thank you!

[JD3D_CGI]

Ahh - right, that second crash - the one with the image - that was actually due to an old version of Railclone on a render node. So don't worry about that!

The main crash problem is when you render the splash and foam as "render as geometry" the scene crashes.

but please also look at the fact that the ocean renders completely differently on AMD and Intel.

[georgi.zhekov]

So we ran some tests in here and here how it looks on our end comparing Intel and AMD rendering.

Is this the result you're getting?

[Svetlin.Nikolov]

(we also managed to reproduce the Render as Geometry crash and looking at it right now)

[JD3D_CGI]

So we ran some tests in here and here how it looks on our end comparing Intel and AMD rendering.

Is this the result you're getting?

edit entire post: I completely ignored your comment that I actually quoted.

You can see however that my results, with the assets actually in the scene are different

[Svetlin.Nikolov]

Dang, this is nasty - then it means it's up to a specific CPU model, and not the brand in general.

Georgi was comparing a:
- AMD ThreadRipper 1950x @ 3.60GHz 16 cores 32 threads
versus an
- Intel i7-5820K @ 3.30GHz 6 cores 12 threads

What CPUs do you have?

Also we narrowed down the Render as Geometry crash to the rounder corners bump - it goes wrong when it interacts with the Particle Shader set to Render as Geometry. Now looking for what causes it a low-level and how to fix it...

Cheers!

[JD3D_CGI]

Damn.

But to be fair, as per another post I've made recently that seems to have gone missing - it's not just you (Phoenix) getting different results per CPU manufacturer in some cases - happening on normal arc viz work too.

AMD:

AMD Ryzen 7 1800X
Cores 8
Threads 16
Name AMD Ryzen 7 1800X
Code Name Summit Ridge
Package Socket AM4 (1331)
Technology 14nm
Specification AMD Ryzen 7 1800X Eight-Core Processor
Family F
Extended Family 17
Model 1
Extended Model 1
Stepping 1
Revision ZP-B1

Intel:

Intel Core i7 4770K
Cores 4
Threads 8
Name Intel Core i7 4770K
Code Name Haswell
Package Socket 1150 LGA
Technology 22nm
Specification Intel Core i7-4770K CPU @ 3.50GHz
Family 6
Extended Family 6
Model C
Extended Model 3C
Stepping 3
Revision C0


I don't have time to double check, but if I recall, my other Intel render node (i7 3770k) was renderign the same as the Intel - so both Intels were the same.

[georgi.zhekov]

Just to be sure - both machines are using the same Phoenix and V-Ray builds right?

[JD3D_CGI]

Just to be sure - both machines are using the same Phoenix and V-Ray builds right?

Ahh....

The AMD was a nightly build....

[Svetlin.Nikolov]

Hey, the Render as Geometry + rounded edges crash should be fixed in today's nightlies. Thanks a ton for helping catch this!