Page History

This page provides information on the Post Translate tab of the V-Ray Renderer settings.

Overview

...

The Post Translate tab exposes options for Python Post Translate of .vrscenes. You can import a script file or write a script directly in Houdini to control plugin parameters.

The V-Ray for Houdini's Post Translate support is based on AppSDK Python binding.

UI Path:

||out Network|| > V-Ray > V-Ray Renderer > Post Translate tab

||V-Ray Shelf|| > ROP Settings > Post Translate tab

V-Ray menu > Render Settings > Post Translate tab

Main Parameters

...

Section
Column width 60%55% Use File – Enable to use a Python post-translate file. File – Adds a Python post-translate file. Use Script – Enable to use a Python post-translate script. Script (Python) – Adds a Python post-translate script. Column width 5%   Column width 35%45% Image Removed

...

Image Added

Advanced Parameters

...

Section

Column width 60%55% File – Shows the number of post-translate files. Add – Adds another instance. Delete– Removes last instance. Clear – Clears all instances. Remove – Removes a post-translate file. Insert Before – Inserts a post-translate file before the current file. Use – Enable to use the post-translate file. File (*.py) – Adds a post-translate file. Column width 5%   Column width 35%45% Image Removed

...

Image Added

...

Example: List Scene Plugins

import os
import vray
from vfh import vfh_utils

with vray.VRayRenderer() as renderer:
    for plugin in renderer.plugins:
        vfh_utils.logInfo('plugin ' + plugin.getName() + ' (class ' + plugin.getType() + '):\n')

...

...

Example: Change Color

...

Code Block
import vray r = vray.VRayRenderer() p = r.plugins["|mat|vrayMaterialBuilder|vrayMtl"] p.diffuse = vray.AColor(0, 1, 1, 1)

 

 

...

Example: Automatically Switch off Displacement for Phantom objects

...

Code Block

import vray from vfh import vfh_utils renderer = vray.VRayRenderer() for node in renderer.plugins: if node.getType() != 'Node': continue if not node.object_properties: continue objProps = node.object_properties needFix = objProps.camera_visibility == 0 or objProps.matte_surface == 1 if not needFix: continue instancer = node.geometry if not instancer.instances: continue for instance in instancer.instances[1:]: # First item is time instancedNode = instance[-1] # Node is last if type(instancedNode) is not vray.Plugin: continue if instancedNode.getType() != 'Node': continue if instancedNode.geometry.getType() in {'GeomDisplacedMesh', 'GeomStaticSmoothedMesh' }: instancedNode.geometry = instancedNode.geometry.mesh vfh_utils.syslog("Disabling displacement for \'%s\"" % instancedNode)

 

Here, you can check how the script changes the render. 

Section
Column width 20% Column width 60% Before after afterLabel On beforeLabel Off Panel borderStyle none Panel borderStyle none Column width 20%

 

 

 

...

...

Example: Convert textures to TX format before rendering

import os
import vray
import subprocess
from vfh import vfh_utils


def convertToTX(f):
    make_tx = os.path.join(os.environ['VRAY_APPSDK'], 'bin', 'maketx.exe')
    cmdArgs = [
        make_tx,
        f
    ]
    call = ' '.join(cmdArgs)
    proc = subprocess.Popen(call, universal_newlines=True)
    proc.communicate()
    return os.path.splitext(f)[0] + '.tx'


with vray.VRayRenderer() as renderer:
    for plugin in renderer.plugins:
        if (plugin.getType() == 'BitmapBuffer'):
            if(os.path.splitext(plugin.file)[1] != '.tx'):
                if( not os.path.exists(os.path.splitext(plugin.file)[0] + '.tx')):
                    plugin.file = convertToTX(plugin.file)
                else:
                    plugin.file = os.path.splitext(plugin.file)[0] + '.tx'