topic python script that adds Arnold node - hypershade not updating in Maya Programming Forum

python script that adds Arnold node - hypershade not updating

Anonymous — Tue, 27 Nov 2018 08:33:19 GMT

When executing this simple script that adds an Arnold standard surface node:

________

for item in selection:

cmds.createNode( 'aiStandardSurface', n=item )

_______

Hypershade does not update the "Materials" tab to indicate the material is there. It shows up in the in the outliner with (DAG objects only = FALSE).

How do I add the shader to Materials tab???

Thanks.

Re: python script that adds Arnold node - hypershade not updating

sean.heasley — Thu, 29 Nov 2018 15:29:25 GMT

Hi @Anonymous

How are you using this script?

I just made a new scene with a basic object and tried running the script but only get syntax errors.

Re: python script that adds Arnold node - hypershade not updating

mspeer — Thu, 29 Nov 2018 23:00:08 GMT

Hi!

Just creating this one node is not enough.

If you use the UI to create a material there is a lot more going on like creating additional nodes and make connections to other nodes.

These nodes and connections to these nodes are needed:

- ShaderGroup

- materialInfo

- renderPartition

- lightLinker

- defaultShaderList

If you want to work with single nodes, use the Node Editor.

Edit:

If you only need the visibility in Hypershade use command shadingNode, this creates a connection to defaultShaderList:

https://help.autodesk.com/cloudhelp/2015/CHS/Maya-Tech-Docs/CommandsPython/shadingNode.html

Re: python script that adds Arnold node - hypershade not updating

Anonymous — Fri, 30 Nov 2018 18:03:23 GMT

Awesome! This saves a line of python. Instead of creating the node and doing a connectAttr to the appropriate list, I can just create and connect in one line. Thank you!