How to use Python to implement rendering with Octane in C4D and export as PNG

tx3008

Dunhou

You need check the Octane BaseVideoPost to get the data container.

You can change the render settings and use RenderDocument to render images.

In case if you didn't want to use my extra libs, the GetVideoPost is not complicated.

Cheer~
DunHou

# 获取渲染器VideoPost
def GetVideoPost(document: c4d.documents.BaseDocument = None, videopost: int = ID_REDSHIFT) -> Optional[c4d.documents.BaseVideoPost]:
    """
    Get the videopost of given render engine of filled document.

    Args:
        document (c4d.documents.BaseDocument, optional): Fill None to check active documents. Defaults to None.
        videopost (int, optional): The id of the videopost. Defaults to ID_REDSHIFT.

    Returns:
        Optional[c4d.documents.BaseVideoPost]: The videopost we get.
    """
    if not document:
        document = c4d.documents.GetActiveDocument()

    rdata: c4d.documents.RenderData = document.GetActiveRenderData()
    vpost: c4d.documents.BaseVideoPost = rdata.GetFirstVideoPost()
    theVp: c4d.documents.BaseVideoPost = None

    while vpost:
        if vpost.GetType() == int(videopost):
            theVp = vpost
        vpost = vpost.GetNext()
    return theVp

import c4d
import Renderer

def main():

    OctaneRenderer = Renderer.GetVideoPost(c4d.documents.GetActiveDocument(),
                                           Renderer.ID_OCTANE)

    OctaneRenderer[c4d.SET_PASSES_FILEFORMAT] = 10 # Octane PNG, 6 = PNG
    OctaneRenderer[c4d.SET_PASSES_SAVE_MAINPASS] = True
    OctaneRenderer[c4d.SET_PASSES_ENABLED] = True
    OctaneRenderer[c4d.SET_PASSES_SAVEPATH] = "Render/$prj/$prj"

    c4d.EventAdd()

if __name__=='__main__':
    main()

tx3008

@Dunhou
Thank you very much for answering my questions. I saw your library yesterday and tried to write like this

from typing import Optional
import c4d


ID_OCTANE: int = 1029525 # Octane 
ID_REDSHIFT: int = 1036219 # Redshift
ID_ARNOLD: int = 1029988 # Arnold
ID_VRAY: int = 1053272
ID_CORONA: int = 1030480
ID_LOOKS: int = 1054755
ID_CENTILEO: int = 1036821
ID_OCTANE_VIDEO_POST = 1029525 # octane render
file_path="C:/Users/admin/Documents/WXWork/1688858265477290/Cache/File/2024-09/OC_light/11.png"

doc: c4d.documents.BaseDocument  # The active document
op: Optional[c4d.BaseObject]  # The active object, None if unselected

def GetVideoPost(document: c4d.documents.BaseDocument = None, videopost: int = ID_REDSHIFT) -> Optional[c4d.documents.BaseVideoPost]:
    """
    Get the videopost of given render engine of filled document.

    Args:
        document (c4d.documents.BaseDocument, optional): Fill None to check active documents. Defaults to None.
        videopost (int, optional): The id of the videopost. Defaults to ID_REDSHIFT.

    Returns:
        Optional[c4d.documents.BaseVideoPost]: The videopost we get.
    """
    if not document:
        document = c4d.documents.GetActiveDocument()

    rdata: c4d.documents.RenderData = document.GetActiveRenderData()
    vpost: c4d.documents.BaseVideoPost = rdata.GetFirstVideoPost()
    theVp: c4d.documents.BaseVideoPost = None

    while vpost:
        print(vpost.GetType())
        if vpost.GetType() == int(ID_OCTANE_VIDEO_POST):
            theVp = vpost
        vpost = vpost.GetNext()
    return theVp
def main():

    OctaneRenderer = GetVideoPost(c4d.documents.GetActiveDocument(),ID_OCTANE)

    OctaneRenderer[c4d.SET_PASSES_FILEFORMAT] = 6 # Octane PNG, 6 = PNG
    OctaneRenderer[c4d.SET_PASSES_SAVE_MAINPASS] = True
    OctaneRenderer[c4d.SET_PASSES_ENABLED] = True
    OctaneRenderer[c4d.SET_PASSES_SAVEPATH] = file_path

    c4d.EventAdd()

if __name__=='__main__':
    main()

But there are no images generated in the directory. What could be the reason?

Dunhou

@tx3008 You just modify the rd but not rendering anythings.

tx3008

@Dunhou I understand now. I have tried it successfully. Thank you very much!

i_mazlov

Hi @tx3008,

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

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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

Third party software is out of scope of our Support Procedures, namely:

We cannot provide support for third party libraries.

Hence I've moved your thread to the "General Talk" forum.

Many thanks to @Dunhou for taking an active role of our community! Much appreciated!

Cheers,
Ilia