Community
Arnold for Cinema 4D Forum
Rendering with Arnold in CINEMA 4D using the C4DtoA plug-in.
cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Adaptive Sampler & Custom Filters

11 REPLIES 11
Reply
Message 1 of 12
mckenzie2VER2
293 Views, 11 Replies

Adaptive Sampler & Custom Filters

I'm trying to setup the AOV to show the sample density as mentioned in the docs, however the AA_inv_density AOV appears black. I changed the filter to heat map but the docs mention a AiAOVSampleIteratorGetInvDensity() function call, not sure what to do with this?

11 REPLIES 11
Message 2 of 12

Are you using adaptive sampling? AA_inv_density works with adaptive sampling only.

We'll update the docs. This sentence is in the wrong section:

The AA_inv_density AOV can help to visualize the sample density with Adaptive Sampling. Use it with a heatmap filter.



// Stephen Blair
// Arnold Renderer Support
Message 3 of 12

Yes, I was trying adaptive sampling but the the AOV appears black. I had the Heatmap filter on under the Main>Sampling section.

Message 4 of 12

What's the max samples for adaptive? Try putting that as the maximum for the heatmap filter.

 

I would expect blue, not black. 



// Stephen Blair
// Arnold Renderer Support
Message 5 of 12

I had 6 max originally - tried the default 20 and it was the same.

Message 6 of 12

And you get black in the Arnold IPR Window?
With just default settings, you should be getting some blue. Try with a simpler scene.



// Stephen Blair
// Arnold Renderer Support
Message 7 of 12

I do.

 

Tried a blank scene with just a cube, plane and a skydome. When I select the AA_inv_density AOV from the IPR it's black. 

Message 8 of 12

And you set the filter to heatmap?

c4dtoa_heatmap.png



// Stephen Blair
// Arnold Renderer Support
Message 9 of 12

Yes, just like in the screenshot in post #5.

Message 10 of 12

I can see a heat map effect in the beauty, but I'm under the impression I should see something in the AA_inv_display AOV?

Message 11 of 12

You should change the filter for AA_inv_density only, not for the beauty.

beauty should be using the driver filter (gaussian), and AA_inv_density should be using heatmap

The attached zip archive has a Cinema 4D 2023 scene that works.



// Stephen Blair
// Arnold Renderer Support
Message 12 of 12

Perfect!

 

So the denser areas on the heat map are those that will get more adaptive sampling?

 

I'm trying to get a decent render time on this interior, it took just over 2 hours on 32 cores. Not sure if that is representative or not. Sampling settings attached. 

Can't find what you're looking for? Ask the community or share your knowledge.

Post to forums  

Autodesk Design & Make Report