This Python script should clear most of the gunk off a Poser 11 scene you want to render to Preview. It assumes you have only one Group and also that the Ground is present in the scene.

# Clear PREVIEW scene of unwanted guide gunk, before rendering to PREVIEW.
# Your Poser 11 scene is assumed to have it it a GROUND and one visible GROUP box.
# Version 1.0

import poser

scene = poser.Scene()

# Turn off PREVIEW visibility of "Grouping 1" grouping box, by internal name

actor = scene.ActorByInternalName("Grouping 1")
actor.SetVisible(0)

# Ensure all scene lights are not displaying their guide-wires in PREVIEW.

if (scene):
    lights = scene.Lights()
        for light in lights:
        if (light.LightOn()):
              light.SetOnOff(0)
        else: light.SetOnOff(0)

# Ensure current selection's DisplayOrigin guides (aka 'axis wires' or 'green rods') are off in PREVIEW.
# Can be left on by accident or auto-activated on coming back from SKETCH Designer to PREVIEW.

for actor in scene.Actors():
    actor.SetDisplayOrigin(0)

# Now select the GROUND to ensure no bounding boxes or similar are displaying on figures or props.
# GROUND must be present in the scene, of course, but it nearly always is.

scene.SelectActor(scene.Actor("GROUND"))

# Redraw the cleaned PREVIEW scene ready for rendering.

scene.Draw()

Save as a .txt file, rename to .py

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Learn the Secrets of Poser 11 and Line-art Filters.