V-Ray settings presets in a shelf button

[Karol.Osinski]

Hey all,
I am trying to implement a set of buttons on the shelf so my colegues at work don't have to call me every time to change V-Ray settings from low quality previews / production quality blablabla. I know it can be done by loading a preset file but I know people are lazy and those few more clicks are gonna be too much for some.

I created a new shelf button and by following ScriptEditor calls I inserted necessary lines to change settings and it looks like it works.

I would like to make sure that every button adds denoiser render element and sets it to Mild like this:

vrayAddRenderElement denoiserChannel;
setAttr "vrayRE_Denoiser.vray_preset_denoiser" 0;

then my small issue is that everytime you chose anotheer preset it will add another denoiser element on the top. Can I avoid it by putting some sort of IF STATEMENT that check if there is already a denoiser element active?

Thanks in advance,
Karol

[dgruwier]

I have a python version of that lying around that I use to add all my commonly used render passes.

import pymel.core as pm
import maya.mel as mel

elements = pm.ls(type='VRayRenderElement')

if not 'vrayRE_Denoiser' in elements:
    mel.eval('vrayAddRenderElement denoiserChannel')

[Karol.Osinski]

Thank you very much dgruwier !!! Damn, after all this piece of Python code worka and looks so much like Java.