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Rendering strands with animated inputs

8 REPLIES 8
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Message 1 of 9
joostkonemann
1032 Views, 8 Replies

Rendering strands with animated inputs

I've been playing with strands and strange attractors, see image. Though I noticed when an input to the graph is exposed to Maya and animated, for some frames Arnold does render the strands, but in most cases it renders nothing.

I captured my screen to clarify.

 

Is this a known issue?

 

strange_attractor.png

 

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MacBook Pro 13,3 - 2.7GHz - 16GB - Radeon Pro 460 - macOS Catalina 10.15
8 REPLIES 8
Message 2 of 9
WindXu
in reply to: joostkonemann

Thanks for reporting this problem to us. If possible, could you please share one test scene with us?

Message 3 of 9
joostkonemann
in reply to: WindXu

This is the scene showing the issue.

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MacBook Pro 13,3 - 2.7GHz - 16GB - Radeon Pro 460 - macOS Catalina 10.15
Message 4 of 9
WindXu
in reply to: joostkonemann

Thanks for the quick response. We will investigate it and get back to you once we get anything. Thanks again.

Message 5 of 9
syracoj
in reply to: joostkonemann

Try adding an assign_material node right before the output node.

you can create a standard_surface in the graph or you can create an aiStandardSurface in DG land and middle mouse button (MMB) dragAndDrop it into the graph as a referenced IBP (input by path). From there (regardless of material creation you do) connect it to the surface input of the assign_material node and see if that helps.

Message 6 of 9
joostkonemann
in reply to: syracoj

Thanks John, this resolved the issue.

 

 

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MacBook Pro 13,3 - 2.7GHz - 16GB - Radeon Pro 460 - macOS Catalina 10.15
Message 7 of 9
syracoj
in reply to: joostkonemann

no prob.

another thing to try is to add a set_arnold_strand_setting node before the output node. <- try this and let me know if this also works on your side.

Message 8 of 9
joostkonemann
in reply to: syracoj

This works as well. Thanks.

 

Though, I guess preferably, both options should not be needed and Arnold should render at least something, right?

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MacBook Pro 13,3 - 2.7GHz - 16GB - Radeon Pro 460 - macOS Catalina 10.15
Message 9 of 9
syracoj
in reply to: joostkonemann

the construct_strands should either render or not render. It should not inconsistently do both. Discussed with Jonah and he feels that we should enforce it to render a guaranteed minimum width in all cases. Still trying to understand whether or not the animated input is a factor in the problem or not. Regardless, I will be drawing up a ticket to catalogue this as a defect. As of now it is being interpreted as a rendering defect. More to follow later.

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