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Rendering with Arnold in Houdini and Solaris using the HtoA plug-in.
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Htoa saves the file and the material is lost.

18 REPLIES 18
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Message 1 of 19
2867145495
849 Views, 18 Replies

Htoa saves the file and the material is lost.

4246-1.jpg

@htoa developer. Hello! Since arnold released the GPU test version. There is always a problem with the htoa material. Just save the houdini file and open the houdini file. The materials of arnold are all lost. This makes us unable to produce! When this problem is expected to be resolved, it has been reflected once.

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18 REPLIES 18
Message 2 of 19

What version of HtoA houdini do you see this?

Are there any errors in the console?



Ashley Handscomb Retallack
Arnold Support Specialist
Arnold Documentation | Arnold Downloads
Message 3 of 19
2867145495
in reply to: 2867145495

houdini17.5.327 and htoa4.2.0There is no prompt, as long as the houdini file is saved, all the materials are lost when you open the houdini file you just saved.

Message 4 of 19
2867145495
in reply to: 2867145495

Who can answer this question, sincerely ask for advice. If it is a bug, depending on the official's intention to fix it, this problem has been more than two months. It seems that the official also directly ignores my problem, but it is really confused, even if it is a bug, I hope the official will say it.

Message 5 of 19
Anonymous
in reply to: 2867145495

Work fine here
For sure there is something wrong in your houdini.env file.
Do you have any others renderer like: Redshift, Octane, Renderman?

Message 6 of 19
2867145495
in reply to: 2867145495

I recorded a silent video and I understood it at a glance。https://vimeo.com/351411244

Message 7 of 19
Stephen.Blair
in reply to: 2867145495

A 9 minute video? You say you know the problem. Can't you just write down the problem?



// Stephen Blair
// Arnold Renderer Support
Message 8 of 19
2867145495
in reply to: 2867145495

It should be that I express the problem. I mean that since I know the problem, if I can open the program, I should be able to find the problem. Look at the specific problem caused by the code. This reason is definitely not related to the path of the .env file in the houdini documentation. Thank you for your help. It has been plagued by this problem for a long time. This problem has been encountered in the project for half a year. I also hope that htoa is getting better and better. If the official development is not so busy, you can look at the specific reasons. Thanks to htoa official. Great renderer. The company has been using htoa to make projects for three years.

Message 9 of 19
Anonymous
in reply to: 2867145495

To avoid conflicts with other rendering engines,it is best to use json file for each renderer like
Arnold.json
Redshift.json
Vray.json
Corona.json
Renderman.json

etc..

Leave Houdini.env file empty, do not put anything in it

Create packages folder inside "C:\Users\Your_USER_NAME\Documents\houdini17.5" and put all your json file

#Here is one for Arnold.json
{
"env":
[
{
"PATH":
[
"C:/Users/rachid/htoa/htoa-4.2.0_rcd74057_houdini-17.5.327/htoa-4.2.0_rcd74057_houdini-17.5.327/scripts/bin;"
]
},
{
"HOUDINI_PATH":
[
"C:/Users/rachid/htoa/htoa-4.2.0_rcd74057_houdini-17.5.327/htoa-4.2.0_rcd74057_houdini-17.5.327"
]
},
{
"ARNOLD_PLUGIN_PATH":
[
"C:/Arnold_Shader/alShaders/bin;C:/Arnold_Shader/Octoplug/bin;C:/Arnold_Shader/pota/bin;C:/Arnold_Shader/dusty/bin;C:/Arnold_Shader/Osl/bin;"
]
}
]
}


########## Redshift.json
{
"env":
[
{
"PATH":
[
"C:/ProgramData/Redshift/bin;"
]
},
{
"HOUDINI_PATH":
[
"C:/ProgramData/Redshift/Plugins/Houdini/17.5.327"
]
}
]
}


########## Renderman.json
{
"env":
[
{
"RFHTREE":
[
"C:/Program Files/Pixar/RenderManForHoudini-22.6"
]
},
{
"RMANTREE":
[
"C:/Program Files/Pixar/RenderManProServer-22.6"
]
},
{
"PATH":
[
"C:/Program Files/Pixar/RenderManProServer-22.6/bin;"
]
},
{
"HOUDINI_PATH":
[
"C:/Program Files/Pixar/RenderManForHoudini-22.6/17.5"
]
}
]
}


The only conflict even with json.file is with Arnold/Renderman
The solution is simply load Arnold or Renderman (by renaming Arnold.json to something like Arnold.json_Backup or Renderman.json to Renderman.json_XX )
Hope this help

Message 10 of 19
2867145495
in reply to: 2867145495

This is not the problem. Why do you always think of this kind of problem? The document that houdini always thinks about. The arnold path of the .evn file is wrong, or it conflicts with other ones! The first is even a conflict. How did these conflicts before? Second, even if you only install arnold without installing any other renderers, the material will not be the same and will be lost. Isn't there a real fundamental solution? Everything is simple. The blow can be tested directly, just install htoa and you will understand.

Message 11 of 19

Are you able to share a scene which you have saved with a material in it so I can see if it loads correctly for me?



Ashley Handscomb Retallack
Arnold Support Specialist
Arnold Documentation | Arnold Downloads
Message 12 of 19

So the issue is with loading the scene by double-clicking the file in windows it to load houdini?



Ashley Handscomb Retallack
Arnold Support Specialist
Arnold Documentation | Arnold Downloads
Message 13 of 19
2867145495
in reply to: 2867145495

I recorded a silent video and I understood it at a glance.https://vimeo.com/351411244

Message 14 of 19
Anonymous
in reply to: 2867145495

I never had that kind of problem.The material is the same after saving, never lost
The only confilt is with renderman.
Here is snapshot houdini shop and houdini mat

4272-htoa-shop.jpg

4273-htoa-mat.jpg


Again can you post your houdini.env file here?

Message 15 of 19
2867145495
in reply to: 2867145495

Ok, there is no way to send houdini.evn I turned into txthtoa.zip

Message 16 of 19
Anonymous
in reply to: 2867145495

Here is a video showing the material after saving the scene
https://youtu.be/g4uNKUL67lc
and here is the video showing your scene without any problem
https://youtu.be/3M2I1ebUIfo
So are you satisfied?

Message 17 of 19
2867145495
in reply to: 2867145495

In this way, it is no problem to open houdini first, and then go to file-Open to access the file. Can be opened successfully. This video also demonstrates this way to open. Now is a saved file, directly by double-clicking it will lose the material, you see my video is a bit boring, you insist on seeing me. You also demonstrated this in my video. You double-click on the saved .hip file to start the game. The opportunity to discard the material indicates that the houdini recognition material was unsuccessful at startup. Will cause a loss.https://vimeo.com/351411244

Message 18 of 19
Anonymous
in reply to: 2867145495

All my input are based on this:
....There is always a problem with the htoa material. Just save the houdini file and open the houdini file. The materials of arnold are all lost
witch is NOT !

Double-clicking to open a file is another story!

Message 19 of 19
2867145495
in reply to: 2867145495

@Ashley Handscomb Retallack Yes, double-click on the .hip file and start houdini and you will get a problem with the material being lost. This also shows that htoa loading material is not successful.

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