topic Re: Bifrost Feather Generator Tool in Bifrost Forum

Bifrost Feather Generator Tool

sachin.shrestha — Tue, 22 Dec 2020 18:49:47 GMT

Hi folks,

Somebody asked me in my webinar last week if it was possible to generate feathers in bifrost. Here is an example of that. I am also attaching my example file for people to study and build on top of. You could add another layer of barbule strands to the barbs and generate even more detail. The setup is a couple of hours work so I'm sure it can be improved a lot more.

Scene File Details:

Maya 2020.4

Bifrost 2.2.0.1

MJCG and Rebel Pack Required

Scanned for Maya malware and none found.

Have fun!

Cheers,

Sachin

Re: Bifrost Feather Generator Tool

darioOrtisi — Tue, 22 Dec 2020 20:10:40 GMT

Great job

Re: Bifrost Feather Generator Tool

mihirsbcc — Wed, 23 Dec 2020 04:02:11 GMT

Nice work Sachin

Re: Bifrost Feather Generator Tool

sachin.shrestha — Wed, 23 Dec 2020 05:47:49 GMT

And now with barbules growing on barbs.

Updated maya scene file attached. It might be messy noodles but hopefully it shows you how to create something like this.

Naya 2020.4

Bifrost 2.2.0.1

Required compatible MJCG and Rebel Pack compounds.

# Autodesk.MayaScanner : Scan completed: no issues found

Cheers,

Sachin

Re: Bifrost Feather Generator Tool

mihirsbcc — Thu, 24 Dec 2020 02:37:15 GMT

Hi Sachin, Which version MJCG ? I have 1_3_2 . I am getting error (disconnected nodes) when I open your scene.

I have rebel pack 0.4.

Thank you.

Re: Bifrost Feather Generator Tool

sachin.shrestha — Thu, 24 Dec 2020 03:50:15 GMT

Rebel Pack 0.4.0 and MJCG 1.3.2 should work. Some other users have been able to open the file without any issues after they installed those packs. So, maybe something else? Can you post a screenshot of the error? And also, when you start Maya and it loads bifrost, it outputs a log on the script editor with some info about loading bifrost and its compounds. Can you also share those messages?

Thanks,

Sachin

Re: Bifrost Feather Generator Tool

mihirsbcc — Thu, 24 Dec 2020 18:17:36 GMT

Thanks Sachin. I do have both rebel pack 04 and MJCG 1.3.2. I will take
some screenshots and post them.

Re: Bifrost Feather Generator Tool

mihirsbcc — Thu, 24 Dec 2020 20:00:31 GMT

Fixed my compound folder and it is working now.

Re: Bifrost Feather Generator Tool

mihirsbcc — Thu, 24 Dec 2020 20:01:22 GMT

I fixed my problem. It is working now.

Re: Bifrost Feather Generator Tool

mihirsbcc — Thu, 24 Dec 2020 20:20:39 GMT

You mentioned about your webinar. Can I join your webinar?

Re: Bifrost Feather Generator Tool

sepu6 — Thu, 24 Dec 2020 21:42:03 GMT

You need to watch it here

https://register.gotowebinar.com/recording/7900587392567496717

Re: Bifrost Feather Generator Tool

mihirsbcc — Sat, 26 Dec 2020 17:44:56 GMT

Awesome webinar Sachin. I am glad that you gave a demo of your terrine carving. Can I email you some times? I am in US. Started my 3D instructor carrier20 years back at Prasad Video Digital in Chennai.

Re: Bifrost Feather Generator Tool

mihirsbcc — Sat, 26 Dec 2020 17:46:55 GMT

Re: Bifrost Feather Generator Tool

Anonymous — Fri, 19 Feb 2021 08:09:42 GMT

When I render it on Arnold, There are no barbs. I can see the barbs in view port. But I can't see it in final render view.
How can it be fixed.

Re: Bifrost Feather Generator Tool

sachin.shrestha — Sat, 20 Feb 2021 02:31:18 GMT

I had reported this to Arnold folks and they confirmed it was a bug. Not sure if it got fixed in the latest release as I haven't tested this yet but you could try with the latest arnold and bifrost versions.

Re: Bifrost Feather Generator Tool

mihirsbcc — Sat, 20 Feb 2021 22:13:58 GMT

Renders only the main strands, not the micro fibers. Latest Arnold.

Re: Bifrost Feather Generator Tool

sachin.shrestha — Sun, 21 Feb 2021 04:53:37 GMT

In that case, most likely it's not fixed yet.

Re: Bifrost Feather Generator Tool

valhallen — Sun, 21 Feb 2021 05:11:28 GMT

Awesome work!

Re: Bifrost Feather Generator Tool

jonah.friedman — Mon, 22 Feb 2021 16:43:00 GMT

It looks like those barbs are not rendering because there are a few NANs in there.

The easiest way to test for a NaN in programming is by checking if it's equal to itself. Every comparison with a NaN in floating point numbers is false, so a NaN is not equal to itself. (Note - do not use "not equal", since every comparison with a NaN is false.

I've attached a compound that finds NaNs in point positions and sets them to {0,0,0} as an example.

Re: Bifrost Feather Generator Tool

sachin.shrestha — Tue, 23 Feb 2021 04:15:26 GMT

Yes, the arnold logs did report NaNs but I think the part that trips me up is that bifrost is able to compile the graph whereas the arnold procedural fails (rightly so in case of NaNs). Would be good to have consistent behavior across both to detect issues while building the graph.