Itoo Software Forum
Forest Pack => Forest Pro (*) => Topic started by: LR1243 on August 14, 2009, 05:47:29 PM
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PHEN 0.3 error: (forest) locating instance fmr_0000000029F2D590 |Instance (Mesh00)
But it's always a different number set each render. Any Ideas how to fix this? It was working fine one day then the next I cant get a render out.
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This is an internal error of the shader for Mental Ray. Theorically, it must never happen.
What type of objects are you using as trees: billboards, meshes, proxies... ? What version of Forest and Max have you installed ?
To fix this problem as soon as possible, please send us a copy of the scene. If the file is too big to email it, i can give you a link to our FTP server.
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We just found and solved this bug. The fix will be included in the next patch:
- Mental Ray was triggering an error "locating instance fmr_..." if current layer was hidden. Fixed
As workaround, be sure that the current layer before rendering is visible and rendereable.
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I am receiving this same error with version 3.6.2
I have two forest objects. One represents a forest before a roadway widening project. The other represents the same forest after construction. I created the proposed forest and saved the settings as a preset. I then created the existing forest and applied the preset. I can hide the existing forest and the proposed will render. I can unhide both and they will render. If I hide the proposed and render the existing, I get the error.
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It don't seem to fail using two basic Forest objects, probably there are other factors involved.
Please, try to reproduce the problem in a stripped scene (removing all non-essential objects), and send it to us.
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I always get this error when I have cloned forest objects and then hidden them. I have to recreate the objects manually to resolve it. If that helps any.
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I did first see this error after trying to clone the forest and swap out the spline. I then tried creating it and transfering the settings using the preset. I do not remember having this issue in previouts versions. My file archive is too large to attach here. What is the best way to send it?
Thanks.
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You can upload the scene yo our FTP. I just sent you an email with the username and password.
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Hmm I thought I had a workaround for this one but tonight I loaded the last scene I had set up and indeed, if I hide any of the 7 forest objects I have in the scene I get the same Mental Ray error.
However, if I hide all of them I don't get the MR error. Some reference between them still.
UPDATE: Ok... I now recall how I got around this here, perhaps it is a different problem.
I have each of my 7 Forest objects in their own layer. If I hide any of the layers I get the MR error. If I leave the layers unhidden I can hide the forest objects normally and I don't get the Mental Ray error.
I hope that helps in your debugging.
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I uploaded the files.
Thanks jonavark. That workaround worked for me as well.
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You are right Jonavark. The trick was in the layers:
- The bug happens when two o more Forest objects share a same Custom Object, and some of the Forest are in a hidden layer.
We will fix it for the next patch. Thanks for your help.
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That makes sense. Glad you got a fix on it. For the moment I think I can script hiding for my passes. I look forward to your next build.