Maya Scripting

import maya.cmds as cmds



def _connect_place2d(substance_node):

    """ Connects the place2d texture node to the Substance node """

    place_node = cmds.shadingNode('place2dTexture', asUtility=True)



    connect_attrs = [('outUV', 'uvCoord'), ('outUvFilterSize', 'uvFilterSize')]



    for out_attr, in_attr in connect_attrs:

        cmds.connectAttr('{}.{}'.format(place_node, out_attr),

                         '{}.{}'.format(substance_node, in_attr))



def _find_shading_group(node):

    """ Walks the shader graph to find the shading group """

    result = None



    connections = cmds.listConnections(node, source=False)



    if connections:

        for connection in connections:

            if cmds.nodeType(connection) == 'shadingEngine':

                result = connection

            else:

                result = _find_shading_group(connection)

                if result is not None:

                    break



    return result



def _apply_substance_workflow_to_selected(substance_file, workflow):

    """ Imports a mesh into Maya and applies the shader from a

        Substance workflow to it """

    geometry = cmds.ls(geometry=True)



## Create the substance node and connect the place2d texture node

    substance_node = cmds.shadingNode('substanceNode', asTexture=True)

    _connect_place2d(substance_node)



## Load the Substance file

    cmds.substanceNodeLoadSubstance(substance_node, substance_file)



## Apply the workflow

    cmds.substanceNodeApplyWorkflow(substance_node, workflow=workflow)



## Acquire the shading group and apply it to the mesh

    shading_group = _find_shading_group(substance_node)



    cmds.select(geometry)

    cmds.hyperShade(assign=shading_group)



def demo_load_sbsar_workflow():

    """ Acquires an sbsar from a file dialog, loading and applying it to

        any selected mesh """

    file_filter = 'Substance (*.sbsar);;'



    files = cmds.fileDialog2(cap='Select a Substance file', fm=1, dialogStyle=2,

                             okc='Open', fileFilter=file_filter)



    if files:

        substance_file = files[0]

        _apply_substance_workflow_to_selected(substance_file,

                                              cmds.substanceGetWorkflow())



if __name__ == '__main__':

    demo_load_sbsar_workflow()