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Mike (LMProductions)
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Mar 15 2016, 4:13 PM (183 w, 5 d)

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Sep 2 2018

Mike (LMProductions) added a comment to T56083: Blender consistently deleting Bake files.

Over the three weeks I think Ive managed to eliminate the deleting of bake files. I did this by making all the bake files READ ONLY after they were done baking. Today I viewed the process output from one render job and I noticed a ton of errors where blender was reporting that it could not delete a file. Could it be, that blender is trying to delete my bake files, but cant because I made them read-only??

Sep 2 2018, 8:51 PM · BF Blender

Aug 3 2018

Mike (LMProductions) added a comment to T56083: Blender consistently deleting Bake files.

Did a bake with 5 new domains a couple days ago for torches. Started at frame 1. Baked the domains. Then moved the playhead to a half-way point through the animation to check the fire and they were all there. Then I did a F12 render and 2 of the torches were missing. Checked the bake files and the files for those two domains were gone. Guys, this happens over and over and over again. It’s killing me. I’m literally not able to do anything that requires a bake. We are losing bake files at work that take days to bake! Please help us find a fix or a work-around or something.

Aug 3 2018, 3:00 AM · BF Blender

Jul 30 2018

Mike (LMProductions) added a comment to T56083: Blender consistently deleting Bake files.

here is a link to a dramatically simplified .blend with only 5 smoke domains. (Imagine 4-5 more smoke domains on 10 more layers and that is my scene for the torches). Bake these domains using the external settings, only maybe changing the folders, and then save the project. Close it. Restart the computer or just wait awhile and then make move the playhead to some different frames, and eventually the bake files will disappear. I dont even know what's causing this (thats the problem), or else I would give more specific steps to reproduce it, but again, the behaviour is consistent across 3 machines and different .blend projects on different platforms (mac & windows). We REALLY need some help with this. Cant get any bakes to stay put... and with large bakes (over 200gb collectively and 12+ hours into bakes) this is a HUGE HUGE problem.
Bake sample can be downloaded here: bake_sample.zip

Jul 30 2018, 5:42 AM · BF Blender

Jul 22 2018

Mike (LMProductions) updated the task description for T56083: Blender consistently deleting Bake files.
Jul 22 2018, 11:22 PM · BF Blender
Mike (LMProductions) renamed T56083: Blender consistently deleting Bake files from Blender consistently deleting cached Bake files to Blender consistently deleting Bake files.
Jul 22 2018, 11:21 PM · BF Blender
Mike (LMProductions) created T56083: Blender consistently deleting Bake files.
Jul 22 2018, 11:20 PM · BF Blender

Feb 10 2017

Mike (LMProductions) added a comment to T50639: Blender 2.78b cuda rendering broken on Mac. Illegal Address.

Feb 10 2017, 12:28 AM · Cycles, BF Blender
Mike (LMProductions) created T50639: Blender 2.78b cuda rendering broken on Mac. Illegal Address.
Feb 10 2017, 12:27 AM · Cycles, BF Blender

Oct 21 2016

Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

Yes its still an issue. To my knowledge nobody has even worked on fixing this issue. Furthemore Blender 2.78 renders the light intensity differently on the GPU than it does on the CPU. We have a renderfarm with some machines rendering on the CPU and some on the GPU where available, and on our animations the fire was flickering because the light was different. So we went back to 2.77. 2

Oct 21 2016, 5:41 PM · Cycles, BF Blender

Jun 7 2016

Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

This task is approaching 90-days since it was opened. Is there any progress or work being conducted on this yet on the Mac side of things?

Jun 7 2016, 5:14 PM · Cycles, BF Blender

Jun 1 2016

Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

@Mike (LMProductions), I'm going to continue the discussion from T45093#376557 here because not everyone subscribed to that other thread needs to get emailed about this.
Please confirm that the latest build from builder.blender.org still has the issue. If the issue was already solved then there is no point reopening this report. The render times and tests from March are outdated now after all the changes that have been done since then.

Jun 1 2016, 2:26 AM · Cycles, BF Blender
Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

@Mike (LMProductions), have you tried the latest OS X builds from builder.blender.org and confirmed that your issue still exists?
If it does still exist, please comment on the other ticket with render time comparisons between the CPU and GPU for a .blend that we can test, and we can reopen it as a to do item. Please do understand though that this Windows 10 issue got a lot of developer attenuation because it affects many users and every type of scene. If GPU smoke rendering on OS X is slow and only confirmed by one user, it's unlikely to be prioritized by developers over the hundreds of other tasks they have on their list.

Jun 1 2016, 1:58 AM · BF Blender
Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

I think we can close this report now and consider it resolved. Certainly we'll have to keep an eye on this to ensure it doesn't break again, and hopefully NVidia can improve things on their side. But latest Blender builds should be working OK now with the 980 Ti.
Various other issues came up here and those can get their own reports if they confirmed and worth investigating further, but not all 52 subscribers of this report need to be involved.
Thanks all for the tests & patience.

Jun 1 2016, 12:55 AM · BF Blender

May 23 2016

Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

Ive been communicating with Nvidia Support for several days now, I also made a video for their dev team exactly how to reproduce the issue in win8.1 and win 10. This is the last worthy response I received from them. Supposedly the error has something to do with WDDM 2.0 since thats what windows 10 uses. Windows 7/8/8.1 use WDDM 1.1/1.2/1.3. yw :D
Subject
Rendering time higher in windows 10
Discussion Thread
Response Via Email (Farzana) 05/23/2016 06:07 AM
Hello,
Your case is being escalated to our Level 2 Technical Support group for further attention. The Level 2 agents will review the case notes to troubleshoot the issue and find a solution or workaround. As this process may take some time and require a good deal of testing and research, we ask that you be patient. A Level 2 tech will contact you as soon they can to assist or point you in the right direction.
Best Regards,
-Farzana
NVIDIA Customer Care

May 23 2016, 6:55 PM · BF Blender

May 16 2016

Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

How can it be an Nvidia driver issue when previous versions of Blender worked fine with the 980Ti and Titan on the same OS and Nvidia driver. The only thing that changed was the Blender version, which tells me it's something in The new blender version that is the issue. Furthermore this is a cross platform issue. I have OSX 10.10.4 and have the same problem.

May 16 2016, 4:30 PM · BF Blender

May 6 2016

Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

No activity here for awhile. Any progress on this?

May 6 2016, 5:56 AM · BF Blender

Apr 21 2016

Mike (LMProductions) added a comment to T48219: Retain bounding box render when re-defining bounding box area..

Here is a visual example of what Im talking about..

Apr 21 2016, 2:00 AM · Add-ons
Mike (LMProductions) created T48219: Retain bounding box render when re-defining bounding box area..
Apr 21 2016, 1:51 AM · Add-ons
Mike (LMProductions) added a comment to T47812: GPU renders have warmer colors than CPU renders..

I see this issue is marked "resolved" "by committing rB4cdd6b9bddac: Fix T47812: GPU renders have warmer colors than CPU renders"

Apr 21 2016, 1:38 AM · BF Blender

Apr 20 2016

Mike (LMProductions) added a comment to T47881: Cycles stopping with error: CUDA error: Launch exceeded timeout in cuCtxSynchronize().

I just got this same timeout error in OSX using a dedicated Titan X GPU (no monitors or devices connected to the card). Im using 2.77a and OSX 10.10.4

Apr 20 2016, 9:29 PM · BF Blender

Apr 15 2016

Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

The 980 Ti fan is activated only after reaches a certain temperature. And if a maximum load is put on the card, the fan will still idle until it reaches the temperature necessary to trigger the fan.

Apr 15 2016, 4:32 PM · BF Blender

Apr 14 2016

Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

Hey everyone,
Running out hardware here in the studio and can't test rendering on dedicated 980Ti.
However, here's a build with hack in it: ftp://ftp.blender.org/sergey/tmp/blender-cuda-hack.zip
The hack makes it so all samples within a tile are done in one single CUDA call, meaning there is absolutely no overhead from blender side and all the compute is done on GPU, without Blender doing anything for until the tile is fully done.
So if there's some of you guys who've got 980Ti as non-display card and can test the build i'll be very curious to know it's render time comparison with builds from buildbot.

NOTE: This build will most likely make your GPU used for display to run out into timelimit, so don't render on display GPU with this build.
Apr 14 2016, 6:21 PM · BF Blender

Apr 12 2016

Mike (LMProductions) added a comment to T47812: GPU renders have warmer colors than CPU renders..

I see there has been no activity here for awhile. Just dropping this post to keep the issue fresh. I know a lot of bugs get submitted every day. I did a render last night of a scene with a fire & smoke, and the smoke is a different color on each frame rendered with the GPUs than with the CPUs.

Apr 12 2016, 10:14 PM · BF Blender

Apr 3 2016

Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

@Steve Lund (webhead), that's cool that our results are all aligned :)
@Brecht Van Lommel (brecht), specification-vise -- yes. But we had some confusion around which was related on comparing price-wise. That's not linear in comparison. Surely it's not technical, but that's what artists might be expecting (and what they did in practice).
So at the next step we'll be trying figure out if it's something we can solve from Blender side. There are couple of theories currently:

  • Bad compiled binaries (both blender and cubins, that would be simple to eliminate by re-compiling blender on Win10)
  • Changes in sunchronization primitives in Windows which increased latency of invoking CUDA kernels.

That'd what we're gonna to investigate next. Could take some time tho.

Apr 3 2016, 8:11 AM · BF Blender

Mar 24 2016

Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

CONCLUSIONS:
As you can see from the previous smoke benchmarks and the BMW benchmarks I ran this morning, somewhere between 2.76b and 2.77 the TitanX took a big hit on performance (at last a 75% reduction in performance in non smoke and a massive 90% performance loss when compared to the 780ti when rendering smoke).
@Sergey Sharybin (sergey) we leave this in your capable hands. :)

Mar 24 2016, 7:41 PM · Cycles, BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

Are there non-smoke/fire scenes with huge performance difference between 2.76 and 2.77/latest master?

Mar 24 2016, 5:03 PM · Cycles, BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

Let me clarify some things:

  • Slower rendering of volumes which are using 3D textures (smoke, fire, etc) on GPU in comparison with CPU is not considered a bug. This is a totally new feature for GPU which needs polish, benchmarks and fine tuning.
  • However, if some file which doesn't have smoke/fire textures has a significant slowdown in 2.77 in comparison with 2.76 that we should look into.

In order to troubleshoot this we should have a /blend file which renders fast in 2.76 but renders slow in 2.77 release. So far benchmarks are really confusing: they are comparing different releases with different cards on different files. This isn't helpful at all.
So please bother to provide as simple as possible file which clearly demonstrates speed regression.

Mar 24 2016, 1:47 AM · Cycles, BF Blender
Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

Please do NOT include all sort of GPU slowdown issues into this report! This only makes the report TOTALLY unreadable. This report is ONLY about issues related on the performance of 980Ti cards comparing to 980 and so. All other issues and especially regressions are to be reported SEPARATELY.

Mar 24 2016, 1:34 AM · BF Blender

Mar 21 2016

Mike (LMProductions) added a comment to T47812: GPU renders have warmer colors than CPU renders..

Hi Mike, I take the freedom and edit your file to get it better handled on slow connections and so.
The color error ist still visible but render now much faster to check.
Can you please check on the file?
Btw., the image ashes.jpg is missing in your .blend but does not really matter.


The switch to "Incomplete" was before you add your file, an admin has to change back.
I can verify the color difference between GPU and CPU.
Blender 2.77
Opensuse Leap 42.1 x86_64
Intel i5 3570K
GTX 760 4 GB /Display card
GTX 670 2 GB
Driver 361.28
Mib

Mar 21 2016, 9:52 PM · BF Blender
Mike (LMProductions) added a comment to T45093: Cycles: NVidia GTX 980 Ti rendering at 1/3rd speed of NVidia GTX 980 the same machine?.

ok Im going to pipe in. I've got the same problem. Have two 2013 MacPro's, one with a GTX 980 Ti and the other with a Titan X. Rendering smoke effects in 2.77 takes 2-4x longer for me. Not knowing of this case, I already started a similar report here https://developer.blender.org/T47808

Mar 21 2016, 9:26 PM · BF Blender
Mike (LMProductions) added a comment to T47812: GPU renders have warmer colors than CPU renders..

I see this case is assigned to "none" and priority is "incomplete." Is this bug submission a lost cause?

Mar 21 2016, 5:33 PM · BF Blender

Mar 18 2016

Mike (LMProductions) added a comment to T47812: GPU renders have warmer colors than CPU renders..

Any thoughts after seeing the .blend or the images Thomas?

Mar 18 2016, 1:31 AM · BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

Thanks for the help Joel. Im out of ideas but, I know this will affect a ton of users, as the Titan and 980 Ti cards are among the the top cards on the market right now.

Mar 18 2016, 1:31 AM · Cycles, BF Blender

Mar 17 2016

Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

Ok here is a comparison. We rendered the "Altar of Sacrifice without smoke.blend" but added the smoke domain into it.

Mar 17 2016, 8:45 PM · Cycles, BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

Apologies for the additional comment: Just to verify, ran these same tests on an AMD workstation also running a TitanX (but no 780ti) and the render times were in line (though a little bit longer, cause it's AMD) with the above, so it's not isolated to just this machine but seems to be in line with people who are running the TitanX.
Would be curious to see if anyone with a 980 or 980ti with the larger Vram than the 780ti is having these same problems.

Mar 17 2016, 8:09 PM · Cycles, BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

Render Results for Test.blend:

Mar 17 2016, 7:06 PM · Cycles, BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

yeah Ill give it a try.

Mar 17 2016, 7:01 PM · Cycles, BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

Considering ours is a pretty complicated setup from a tornado scene it's probably not the best thing to send over. If you'd like, you (or I) can create a small test scene and we can compare render times on that!

Mar 17 2016, 4:59 PM · Cycles, BF Blender
Mike (LMProductions) added a comment to T47812: GPU renders have warmer colors than CPU renders..

Here is the rendered CPU image of frame 623.

Mar 17 2016, 4:58 PM · BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

Joel, do you have a .blend file for this that I could try on OSX to compare render times?

Mar 17 2016, 12:09 AM · Cycles, BF Blender

Mar 16 2016

Mike (LMProductions) added a comment to T47812: GPU renders have warmer colors than CPU renders..

Sorry. I thought maybe you guys would've heard of this before and therefore might be able to explain it from just the images. Ive attached the .blend file.

Mar 16 2016, 5:02 PM · BF Blender
Mike (LMProductions) created T47812: GPU renders have warmer colors than CPU renders..
Mar 16 2016, 1:41 AM · BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

ok, so you meant to say "GPU uses more powerful Volume sampling code, that might explain why it takes longer on GPU?"

Mar 16 2016, 1:17 AM · Cycles, BF Blender

Mar 15 2016

Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

The CPU render time in 2.76 was 4:25, and the CPU render time in 2.77 rc2 was 4:13. A slight increase, but again, this is irrespective of the drastic loss in GPU speed. This is concerning as we just spent $2000 in GPUs to increase render times, and in 2.77 all that is lost. I'd stick with 2.76, but quite a few of our scenes have smoke, which was just enabled for GPU rendering in 2.77.

Mar 15 2016, 10:59 PM · Cycles, BF Blender
Mike (LMProductions) added a comment to T47808: GPU rendering taking 4x longer than CPU with smoke effects.

"CPU uses more powerful Volume sampling code, that might explain why it takes longer on GPU."

Mar 15 2016, 10:56 PM · Cycles, BF Blender
Mike (LMProductions) created T47809: Update on super slow GPU rendering in 2.77.
Mar 15 2016, 4:42 PM · BF Blender
Mike (LMProductions) created T47808: GPU rendering taking 4x longer than CPU with smoke effects.
Mar 15 2016, 4:17 PM · Cycles, BF Blender