public GVRRenderData setCullFace(GVRCullFaceEnum cullFace, int passIndex) {
        if (passIndex < mRenderPassList.size()) {
            mRenderPassList.get(passIndex).setCullFace(cullFace);
        } else {
            Log.e(TAG, "Trying to set cull face to a invalid pass. Pass " + passIndex + " was not created.");
        }
        return this;
    }
public GVRRenderData setCullFace ( GVRCullFaceEnum cullFace , int passIndex ) { if ( passIndex < mRenderPassList . size ( ) ) { mRenderPassList . get ( passIndex ) . setCullFace ( cullFace ) ; } else { Log . e ( TAG , "Trying to set cull face to a invalid pass. Pass " + passIndex + " was not created." ) ; } return this ; }
Set the face to be culled

@param cullFace
{@code GVRCullFaceEnum.Back} Tells Graphics API to discard
back faces, {@code GVRCullFaceEnum.Front} Tells Graphics API
to discard front faces, {@code GVRCullFaceEnum.None} Tells
Graphics API to not discard any face
@param passIndex
The rendering pass to set cull face state