LuxCoreRender Forums

Is there any way to speed up the render cancellation? In cycles, when esc is pressed instantly, rendering is stopped, in Luxcore it is still calculating for a long period.

Please upload a simplified testscene that shows the problem.

I found Luxcore to react way faster when canceling renderings than Cycles does - especially when also using the CPU in Cycles.

There is no specific scene, using only CPU I can cancel the render quickly, using GPU + CPU the cancellation takes time.

This also occurs when it is only GPU, so I believe it is the problem.

Are you using tile rendering ? What GPU do you have ? We need a test scene because there literally thousands of possible settings.

If it happens in any scene, it should be easy to upload one, right?

Hello friends, as it is happening in all the scenes I am testing if it cannot be something here in my system, I use a GTX 980 and an Intel 8700 with 32GB of RAM. I'll try to find out, if not, I'll post a test scene for you. Sorry if I was overwhelmed with the creation of the topic, but I thought someone else might be having it and comment, but apparently it is only here.

I know what you're talking about. Or at least, I used to...

I remember the GPU rendering used to take a few seconds to stop the 'batch' that it was working on (I think it even used to print a message like, "Waiting for render threads to terminate" or some such). The last time I noticed was a while ago, possibly before 2.5...?

I believe this is also what prompted YouTuber djtutorials recently to incorrectly instruct his audience (timestamp 29:28) that "you kinda have to spam hitting Esc" (paraphrasing). Although, you can see in the video that Blender doesn't respond and stop immediately.

However, in the 2.5 beta 1, I can't reproduce this behaviour. I think it might've been significantly improved recently

Would it maybe be possible to add an option like "Skip denoising after cancellation" to the Denoiser section? I render very large images and every time I cancel a rendering I have to wait for minutes until the denoising finished (which I don't need). Sometimes the PC won't respond at all and I have to force-close Blender.

That would be great.

I fully support this proposal.
I also find myself in stupid situations where I have to cancel the rendering, and I can not wait for the OIDN - click on xkill