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Pausing Render Bug

Windows 10

GPU mode


After updating to version 9.3 yesterday it looks like render pause no longer functions properly. 


When I click on the pause button, the huge "PAUSED" text appears in the middle of the screen, but the samples keep climbing in the bottom right corner and the CPU/GPU load in Task Manager stays the same.

Best Answer
Hello Derek,

Can you go to the 'edit' tab in the top toolbar, then 'preferences'->'general'?
Here you will see 'Pause Real-time Render after', followed by some options.
What number is shown next to 'samples?
  • If you change the number of samples to '5' and pause the real-time view, does it stop?
  • If it doesn't stop right away, give it a moment
  • If it does stop, how many samples are collected when it stops?
If it stops at 80 samples, this is an issue we have recently discovered with the platform. In GPU rendering mode, real-time samples are collected in multiples of 16. The sample count will finally stop once it believes the correct number of samples has been collected.
CPU rendering does not experience this issue.
​
​We are investigating this issue now and hope to have it resolved as soon as possible. 
Let me know if this is the case.



 


Referencing your Ticket ID#:6967

 

Med Venlig Hilsen / Best Regards,

Erik Williams
Customer Support Specialist
6 CommentsSorted by Oldest First
Answer
Hello Derek,

Can you go to the 'edit' tab in the top toolbar, then 'preferences'->'general'?
Here you will see 'Pause Real-time Render after', followed by some options.
What number is shown next to 'samples?
  • If you change the number of samples to '5' and pause the real-time view, does it stop?
  • If it doesn't stop right away, give it a moment
  • If it does stop, how many samples are collected when it stops?
If it stops at 80 samples, this is an issue we have recently discovered with the platform. In GPU rendering mode, real-time samples are collected in multiples of 16. The sample count will finally stop once it believes the correct number of samples has been collected.
CPU rendering does not experience this issue.
​
​We are investigating this issue now and hope to have it resolved as soon as possible. 
Let me know if this is the case.



 


Referencing your Ticket ID#:6967

 

Med Venlig Hilsen / Best Regards,

Erik Williams
Customer Support Specialist

I set the "Pause Real-time Render after" to the minimum amount of 16 samples. With GPU Mode turned on, real time preview never stops. With CPU Mode turned on it does indeed stop at 16 samples.


This exactly mirrors the problem in render output: GPU Mode never responds to pausing, but CPU Mode does.

I noticed this same bug in KS 9.3.14. When rendering GPU mode, the pause button doesn't pause.


In fact it will continue to process multiple frames of an animation even when it's supposed to be paused.


Pause works fine in CPU rendering mode.

I apologize for the delay.

We have looked into this issue and it has been solved in the KeyShot 10 release.

If you have purchased KeyShot 9 after October 18th or have a maintenance contract with us, you may be qualified to upgrade to KeyShot 10 for free.


If you are still experiencing this issue, please reach out to our team at sales@luxion.com to see if you qualify. Explain to them the situation and how it affects your work.

Our Sales Department will look into this and see what we can do for you.


Thank you for your patience on this matter.

Hi Erik--Not sure if this is the right place to post, but the 'Pause After:" setting seems broken for CPU and has been for a few revisions since KS10.1.

I'm currently on KS10.1.82 (Win10) and the CPU real time render does not pause automatically. Recently upgraded to a Threadripper, so I'd really like to get this auto pause feature back.

You are correct, it seems the pause after feature is not respected while Denoise is enabled.

We are currently working on this issue, but for the time being turning off Denoise and then updating your Pause After settings will get around this issue.


We apologize for the inconvenience. This has been an ongoing issue that we will have solved as soon as possible.


Let me know if disabling Denoise does not work.

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