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Re: Each frame renders longer than previous. All frames similar.
Posted: Wed Jul 03, 2019 3:30 pm
by jayroth
What about baking out the particles to alembic? Does that help to improve the efficiency?
Re: Each frame renders longer than previous. All frames similar.
Posted: Tue Jul 23, 2019 6:47 pm
by Shamefestival
I have this exact issue. I have rain cached x-particles and and a whole scene of assets that are optimized. Anyway, times start at 1min 30sec on frame 1. At frame 103 it raises up to 4m 30secs. HOWEVER------ If i stop and start the render again at frame 103 it renders back at 1min 30sec. Voila! i say render every 12 frames or so and restart frame last frame. You will save tons of time! This seems like a memory buffer type error that can absolutely be fixed. I have no idea how but if I found this method to "fix" it then maybe octane can implement and memory re-buffer thingy. I don't know. Hope this helps. I've attached a pic. Enjoy!
Re: Each frame renders longer than previous. All frames similar.
Posted: Tue Jul 23, 2019 6:52 pm
by Shamefestival
jayroth wrote:What about baking out the particles to alembic? Does that help to improve the efficiency?
I have also tried my rain as an alembic, however Octane doesn't read my vertex speeds X-Y-Z from X-particles from the Octane tag which I would place on the alembic. Without proper motion blur rain looks really poopy. I keep seeing that realfow methods work but nothing at all on X-particles. All in due time I suppose.
Re: Each frame renders longer than previous. All frames similar.
Posted: Tue Oct 22, 2019 10:02 pm
by dsawchak
I think I found a suitable solution! In the xpCache object, under 'Record', I selected 'Custom.'
Then under 'Particle Data', I checked only the fields I needed, which were 'Velocity' and 'Radius'. (My simulation was for a waterfall, but I imagine it would be similar for rainfall).
I haven't tested this exhaustively, but the result was functional (linear) motion blur, lower render times overall, a ~60% smaller cache, and most importantly, no per-frame render time increase! Hopefully this works for you too!
Re: Each frame renders longer than previous. All frames similar.
Posted: Thu Oct 01, 2020 6:43 am
by bahgoogen
i thought this solution was brilliant!
Now my render frames actually start relatively quickly..... but each frame is actually taking longer to render...... it is quite bizzare.
its 100% the motion blur, as if you disable blur, it's fine. I've also noticed switching to just "camera motion blur" instead of "full motion blur" has absolutely helped.
I guess its just managing what's right for your scene, hopefully you can get away with one of these 'hacks'.