Jump to content
awkwardpoly

Pyro renders taking way too long

Recommended Posts

Hey guys, Im rendering a pyro sim around 1-3 mil voxels, im using an environment light and a volume light emitting from the pyroshader. Rendering using PBR with pixel samples 3x3, volume limit 1, noise level, 0.1, volume quality 0.1, volume shadow quality 0.5 and stochastic 8 im not even using motion blur, but one frame is almost taking 1.5 hours. Any ideas how to increase the performance, am i doing some nonos that i missed? the smoke is fairly transparent and the light from the fire is strong.

Share this post


Link to post
Share on other sites

This quality values are already low, seems like a lot of time. What I would check:

 - Is your pc usually that slow with other volumes rendering?

- Which resolution are you rendering?

- Which and how many lights do you have? Keep in mind that enviroment lights take longer to render than a directional or a point light for example

- In the light settings I would check the Sampling Quality if is still at 1

- Being the smoke fairly transparent is possible that Mantra thinks is all noise and is shooting every time the Max Ray Samples. I would also try to reduce this to 4-5 if you have it at an high number and set higher the noise level, just to see if this is the problem

Edited by Andrea

Share this post


Link to post
Share on other sites

Rendering volumes with physically based lighting and shading is incredibly expensive. If you need fast render times then consider deep shadow maps instead of ray tracing for the lighting.

Share this post


Link to post
Share on other sites

i find that adding a volumelimit or geolights spikes volume renders up to 10 folds.  --check does out,  and if like internal scattering, go with geolight my test shows its atleast 2x faster than having a volume limit of 1

or  just add a glow in comp and don't do emissive lights, you'll be lighting fast

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×