topic Re: Bifrost Aero and Vray in Bifrost Forum

Bifrost Aero and Vray

daniel9HCWR — Wed, 18 Oct 2023 07:44:38 GMT

I can get my head around rendering bifrost aero with vray? My VFB is empty when i render? Does anybody know how to assign shader?

In the vray documentation its refered to a vray attribute but it does'nt appear in my attribute panel when i select my bifrost node in the outliner?

Anyone managed this that could help me?

/Daniel

Re: Bifrost Aero and Vray

Christoph_Schaedl — Wed, 18 Oct 2023 08:10:50 GMT

Vray cant render Bifrost Aero. You need to export a VDB.

Re: Bifrost Aero and Vray

daniel9HCWR — Wed, 18 Oct 2023 12:09:24 GMT

Noob question maybe, but what is a VDB?

Re: Bifrost Aero and Vray

morten.bojsen-hansen — Wed, 18 Oct 2023 12:18:26 GMT

OpenVDB is a file format for sparse volumes. You can export them from Bifrost using the write_OpenVDB node.

Re: Bifrost Aero and Vray

daniel9HCWR — Mon, 30 Oct 2023 10:14:54 GMT

How does the write node work? It doesnt seam to write anything?

Re: Bifrost Aero and Vray

sepu6 — Mon, 30 Oct 2023 17:05:23 GMT

Watch this

https://youtu.be/tVkaKXJx91k?si=2b8f47nYhvYZ91AN&t=1708

or this

https://youtu.be/cd3HgvM8sXg?si=PMGXaNkRYm4y2z6R&t=1651

Re: Bifrost Aero and Vray

morten.bojsen-hansen — Tue, 31 Oct 2023 12:53:24 GMT

@daniel9HCWR at least on the of the outputs (on the right hand side of the node) of the write_OpenVDB node has to be connected to either an output node or a terminal for the write_openVDB node to execute.

Re: Bifrost Aero and Vray

daniel9HCWR — Tue, 31 Oct 2023 08:23:45 GMT

Okay, i thought the writing was an alternative output.

The linked youtube-clip showed a method using file-cache node between simulation-node and output.

What is the difference between these to methods?

Re: Bifrost Aero and Vray

morten.bojsen-hansen — Tue, 31 Oct 2023 12:54:29 GMT

The file_cache node just wraps up several of the write_XYZ nodes into one node. You can check this yourself by diving into the node. Personally, I prefer to use write_OpenVDB directly since it give the most control.

Re: Bifrost Aero and Vray

damaggio — Wed, 01 Nov 2023 17:23:24 GMT

Just cache your VDB file and upload in a Vray volume grid for rendering.