Hi I trying to sue the -P command to call a script to override material of my scene.
there is something wrong with it :
I would like to force the render engine to switch in raytrace but Ican't get it to work.

this the code I am using actually :

import mantra

Verbose = True


mantra.setproperty('renderer:renderengine','raytrace')
print ‘Renderer’, mantra.property('renderer:renderengine')


def filterInstance():

print ‘Filtering:’, mantra.property('object:name')

mantra.setproperty('object:surface', ‘opshop/occ’)
mantra.setproperty('objectverridedetail', 1)

even if I use number instead of string nothing changes … but the print tells me it changed !

thanks for your advice

Vincent

you are setting the renderer outside of any filtering function so it will not be called in the right time for the actual mantra node that is being processed, but rather globally before everything

this should work

import mantra

def filterCamera():
mantra.setproperty('renderer:renderengine','raytrace')

thanks Tomas, it works as expected.