python script change Redshift setting

RTF

I want to write a script to set the Settings of Redshift Matpreview
But

import c4d
import c4d.documents
import redshift
import os


def FindVideoPost(renderData, pluginId):
    vp = renderData.GetFirstVideoPost()
    while vp is not None:
        if vp.IsInstanceOf(pluginId):
            return vp
        vp = vp.GetNext()
    return None

def FindAddVideoPost(renderData, vpPluginID):
    vp = FindVideoPost(renderData, vpPluginID)
    if vp is None:
        vp = c4d.documents.BaseVideoPost(vpPluginID)
        if vp is not None:
            renderData.InsertVideoPost(vp)
    return vp

def main():
    doc = c4d.documents.GetActiveDocument()
    renderdata = doc.GetActiveRenderData()

    vprs = FindAddVideoPost(renderdata, redshift.VPrsrenderer)
    if vprs is None:
        return

    # Switch renderer
    renderdata[c4d.RDATA_RENDERENGINE] = redshift.VPrsrenderer

    # Set Redshift render parameters
    vprs[c4d.PREFS_REDSHIFT_MATPREVIEW_MODE] = 1

    # Refresh UI
    c4d.EventAdd()
    # print("Render settings updated to 4K and frame range set to All Frames.")

# Execute the main function
if __name__=='__main__':
    main()

vprs[c4d.PREFS_REDSHIFT_MATPREVIEW_MODE] = 1
This code doesn't seem to have any effect

Then I changed the method and set the code in C4D

import c4d
from c4d import gui

def set_amlimit_preference():
    # 获取全局设置容器
    bc = c4d.GetWorldContainerInstance()

    # 设置新的值为 666
    bc[c4d.PREFS_REDSHIFT_MATPREVIEW_MODE] = 1
    
    # 应用修改后的设置
    c4d.SetWorldContainer(bc)

    # 保存设置到磁盘
    c4d.SaveWorldPreferences()

    # 尝试刷新界面
    c4d.EventAdd()


# 运行函数
if __name__ == '__main__':
    set_amlimit_preference()

Can not be modified successfully

Can someone help me

Dunhou

Hi @RTF , the c4d.PREFS_REDSHIFT_MATPREVIEW_MODE doesn't seem stored in Redshift VideoPost, is this code generated by GPT or something similar？

Back to the topic, this parameter is stored in the Redshift tab of the preferences node. You should get the redshift preference node and then set the parameter.

If you installed Renderer lib or boghma hub, you can use this:

import c4d
from Renderer import Redshift

if __name__ == '__main__':
    Redshift.SetMaterialPreview(preview_mode = 1)

or just few codes:

import c4d

ID_PREFERENCES_NODE = 465001632 # Prefs ID

def GetPreference() -> c4d.BaseList2D:
    """
    Get the Redshift preferenc.
    """
    prefs: c4d.plugins.BasePlugin = c4d.plugins.FindPlugin(ID_PREFERENCES_NODE)
    if not isinstance(prefs, c4d.BaseList2D):
        raise RuntimeError("Could not access preferences node.")
      
    descIdSettings = c4d.DescID(
    c4d.DescLevel(1036220, 1, 465001632), # pref ID Redshift
    c4d.DescLevel(888, 133, 465001632)
    )
    return prefs[descIdSettings]

if __name__ == '__main__':
    redshift_pref: c4d.BaseList2D = GetPreference()
    redshift_pref[c4d.PREFS_REDSHIFT_MATPREVIEW_MODE] = 1

Cheers~
DunHou

RTF

@Dunhou
Thank you for your help, but after I run the following code, the Redshift Settings have not changed
By the way I am a python novice and the above code is written by GPT
I just want to use the script to change the Settings of the image below

Dunhou

you need to change the id of you want

PREFS_REDSHIFT_MATPREVIEW_MODE_BACKGROUND: int = 3
PREFS_REDSHIFT_MATPREVIEW_MODE_IDLE: int = 1
PREFS_REDSHIFT_MATPREVIEW_MODE_OFF: int = 0
PREFS_REDSHIFT_MATPREVIEW_MODE_SUSPEND: int = 2

i_mazlov

Hello @RTF,

Welcome to the Maxon developers forum and its community, it is great to have you with us!

Getting Started

Before creating your next postings, we would recommend making yourself accustomed with our forum and support procedures. You did not do anything wrong, we point all new users to these rules.

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It is strongly recommended to read the first two topics carefully, especially the section Support Procedures: Asking Questions.

About your First Question

The second way that @Dunhou (thank you for being an active part of our community!) has suggested for you is actually the recommended one. The only missing part is executing c4d.EventAdd() in the end, which is likely the reason why you don't see any changes after running the script.

If you'd like to get more explanation on this code, please check this great example code posted by Ferdinand: Python: How to get axis scale from the preference settings?

Cheers,
Ilia

RTF

@Dunhou @i_mazlov
Thanks a lot.