Thank you for your message @ronald_a, unfortunately I don't use cop in my case, just instanced lights but also see that we have one blinking non-instanced.

Hello @brians,
We're still on same kind of project (another) with short deadline and got same light blinking and rendertime exploding..
Support won't project because too heavy... so it would take a time to create same bug in a lighter project... Isn't your job ?

Note that once GPU vram is full, GPU card become useless and rendertime jump by a factor of 4 here.
A 4090 comp become equivalent to a 2080ti comp here..

And it also make 2080ti even more useless.

In brief you have a big problem on the memory management for karma XPU.
It force us to optimize scene and hide as much thing we can to pass bottom the bar of GPU vram.
Feel like working for realtime here

Are you aware of that ? If that somethings in your radar for improvements or an unsolvable technical limitation.

brians
Is it possible you could submit a bug with a repro scene that exhibits the flickering issue?

Project link is shared on same bug than the one of "5K" (same scene) with multiples e-mails with multiple video record illustrate the problem on multiple pass.

For now I havn't succes to reproduce it in a simple scene.
I have also have a deadline and we do our best to deliver project in time.

I have multiple lights blinking in my animation.
Some instanced, other manually placed.

And for some reason one same blinking from time to time randomly on same render pass..
On each interior rendering pass there is one (but not the same) that is blinking.



Project are heavy (many assets and textures) and on we also notice rendering time aberration :
- Time mutiplied by 2 to 10 when there too many objects are in the scene and even if there are no rendering influence
when I hide a scatter of cars for example render take 4min (instead of 40min), same thing if I hide one other. And both have no direct incidence on rendering image. But scene was a bit lighter in memory.

- Time mutiplied by 2 to 10 on still image at big resolution (5K). Render image tiles in 4 or 16 help but not always.
one piece : 12h15min
4 tiles : 2h25min = (21min + 2h22min !!! + 22min + 20min)
16 tiles : 1h40min = (6 + 6 + 6 + 5m30s + 8 + 6 + 6 +7 + 8 + 6 + 6 + 7 + 6 + 6 + 6 + 6)

Anyone experience any of those bad things ?
Is Karma XPU is really production ready ?

I think I have this problem on my current project.
Does this bug is resolved ? Or does we need to triangulated all our polygon to avoid bad surprise ?

You can use the HOUDINI_TEXTURE_DISK_CACHE variable to define a location folder.
With that, take care to set explicitly enough space available with the "size" parameter.
HOUDINI_TEXTURE_DISK_CACHE on documentation [www.sidefx.com]

Ok, thank you for your explanations, hope you'll be able to implement this in a future version.

Hello cwhite, thank you for the log as bug.
Perhaps the curve direction (normal/tangent) can be used to push to the better direction ? Or a sort of custom index id to help to determine the way to go ?

Hello,

I can't manage to make my character moving along all my curve path.
Because once there is a curve intersection, path tends to take shortcut.





Any of you have idea to manage these cases ?
cf. zipped project files
Thank you

@Latimerias, I hope this was resolved now, I didn't take care if all my textures was a power of 2..

I also now have each time the error "Texture Disk Cache: Error creating local cache texture .." for same texture (it was already a power of two).
I don't know why that happen. Have you other advices from your "texture cache" experience ?

I also can't render on my main computer with "only" 3 2080ti.. I got this message "" (for a 4K rendering with lot of 3d assets and textures)

In short any advices are welcome

After support return it appear that's a cache size memory issue that has not enough storage.
Has they say, with the cmd tool we can call :
- "htexcache" command to know how many storage we have and are used.
- and "htexcache -z 40960" for example will set the cache size to 40GB of disk space.

I confirm that corrected the problem.

So simple.. once you know

@Enivob, thank you for your return.
It will not be square like that and be sure I double/triple check that before.

But I've found the problem !
I use the variable {"HOUDINI_TEXTURE_DISK_CACHE" : "temp"} that's normaly :

will use a local disk cache to store the high performance texture files. This cache can be controlled using the htexcache command line utility.

But that seems bugged apparently..
This problem give me nightmares

Hello,

Is there any of you that encountered this critical problem ?
I got black squares artefacts, that appear randomly, on final rendered image :





I try many things, but I don't success to isolate part of scene (once lighter, it comes ok but not on specific piece of scene).
It's a complete project with a lot of asset, instancer, lights, interior and exterior.

Is Karma XPU as some limit on this kind of project ?
How can I workaround now because it's really problematic that I can't finalize ny rendering for client.

Thank you

chrism
https://www.sidefx.com/forum/topic/70943/ [www.sidefx.com]

Hello @chrism,
That's already done : BUG #143599

Hello,

Since last production build 20.5.445, I can't open the "Layout Asset Gallery" panel.
I get this error each time I try :


Note that I'm on windows 11.
I tested on 3 different computers (all on win11), I also tested by removing my env pref, but no luck, same error.

Any idea ?
Is anyone on win11 + H20.5.445 that can tell if it works ?

Thank you,
Julien

Hello,

Some months ago I have same problem, and the solution was to uninstall "Boris" (an OFX plugin) from program file folder.

I don't know if that can help you.

Hello,

I notice shading artefacts on self shadow transition when using a "bump" node.

The fact is when I dezoom from object transition become good (cf. screenshot).



Without bump, no problem.
Using normal map instead, no problem.
Bump on redshift working good.



Does I miss something ? Is it a karma limitation ? Is it a bug ?



cf. joined zipped project files (scene + texure)
Thank you,
Julien

Bug replicated on "simplified" scene (still need all textures).
Mail already sended to suppport.

Hello,

Ok I go on rendering phase this weekend so I'll have probably more info about this "bug ?" recurrence soon and tell you.

For more info I rendering a big ground map composed of 107 textures of 8192 square pixels.
I'm using karma xpu.

I also notice on other frame a similar problem where small polygons and very few (2/4 primitives) don't turn black but dark like with a normal bug.
Once rerendered they became a bit more corrupted (8/9 primitives), then I triangulated and problem is gone(I hope).

I have heavy assets (like textures) but I can share you soon for more investigation.

Hello,

I'm using karma.
I have some polygon that appear black on final image rendering.
But on rerendering same frame all is good. It's not constant.




Do you already experience this kind of problem ?
Does-it have some king of thing to avoid ?
Is there some topology to avoid (triangle only needed ??).

Thank you,
Julien