[Ornatrix] EG Selection issue with Octane material

[akcharly]

Hi, dear Autodesk developers.

So I already spoke with Ephere(Ornatrix) and OTOY(Octane) teams and they said, that I should write a message to you 😃 Because this is 3ds max issue. I think they've already written to you about it, too. But since they asked me to make such a topic, here I am fulfilling that condition.

So, really proof that they were writing about a issue on the 3ds Max side.


Also they said, in this topic, that this is an Ornatrix issue - https://render.otoy.com/forum/viewtopic.php?f=27&t=80910

But Ephere said, that I should speak with you.

And if you really believe Bikram's letter from Otoy, I really should do it 😃

So let's move on to the issue itself.

The point is that when we assign Octane Hair Material in a scene, it stops displaying the selection of guides or hair in Edit Guides.

Timing:

0:00 - Creating the plane
0:04 - Applying Furball
0:11 - Create Edit Guides on top of HFG
0:20 - Turn on Display Strand Selection
0:28 - Turn on Hide Guide Gizmo
0:30 - Check Selection and see that everything is working
0:37 - Activate Octane Renderer
0:45 - Check the selection and see that everything is okay.
0:50 - Try to assign Octane Hair Material
0:57 - We see that the selection has disappeared
1:12 - Assign any other Octane material and the selection still doesn't work
1:19 - Activate Arnold Render and assign Arnold Standard Hair
1:31 - Selection visible again
1:37 - Select Octane
1:42 - Selection works as long as the Arnold Shader is assigned
1:44 - Assign Octane Hair again and see that the selection has stopped working

Steps:

- Create plane
- Apply Furball
- Add EG Above HFG
- Turn on "Display Selection"
- Select a few hairs and you will see selection
- Select Octane Render
- Apply any Octane Hair material and you will see that selection won't work

Ornatrix 7.4.1.31744 [Nightly], 3ds max 2023, Octane 2022.1 - 13.12

The Otoy developer suggested that I can use Octane Shadow Matte, Octane Portal Mtl and Standard Material, and it really does. It helps, but to make Octane Hair Mtl work in viewport, like Arnold Renderer Material, we need your help and some solution they are waiting for. If you look at Bikram's letter

So let's solve this issue here, if possible. I hope for your help and solution followed by a patch for 3ds Max.

Topics I created with this issue on the Octane Forum:

https://render.otoy.com/forum/viewtopic.php?f=27&t=80910

And a similar issue, only with hair coloring.

https://render.otoy.com/forum/viewtopic.php?f=27&t=80945

I hope for your help and a solution to this issue.

Thank you and have a great weekend
Best regards,
Andrew.