Maya mental ray backface culling render?

malcolm

Anyone know how to turn on backface culling when doing a mental ray render in maya. By default it renders both sides of a a model kind of annoying.

glib

I just took a quick look, but it seems that disabling 'double sided' in the object's attributes under 'render stats' did the trick.

FYI it renders both sides in maya software by default until 'double sided' is disabled as well.

malcolm

I'm looking for a switch in the render globals, surely there is an option.

MoP

Just set this up as a shelf button:

{
    string $meshes[] = `ls -typ "mesh"`;
    for ( $mesh in $meshes ) {
        setAttr ( $mesh + ".doubleSided" ) 0;
    }
}

Will set every mesh in your scene to single-sided. I don't know if there's a global flag for it, let me know if you find one

malcolm

You can set all the meshes in the scene to single sided in the attribute spreadsheet ideally I'm looking for a switch in mental ray I swore there was one I might be mistaken.

MoP

Oh, I think you can do it on Render Layer properties.
Just select the defaultRenderLayer, go to the attribute editor, and set "Double Sided" to "Override On". Should do the trick.

Yashaswini Sridhar

Any one kno how to avoid back face culling.. like i need to select all d mid faces of a cylinder in front view n thts not happenin, ther ll b only half faces selected n half left out.. also whn selecting vertices only half ll b selected n not othr half..!! & its not happenin with the switch on & off of back face culling