Open source wrapper for Octane/Redshift/Arnold/Vray/Corona in Cinema 4D.

[Dunhou]

Hi community!

New versions here!

I had change the name from renderEngine to Renderer, and also changed the main structure. see more in the very first of this topic. (renderEngine had been move to versions folder, if you still interested.)

This version is way more organized and user-friendly, you can use few lines of code to do something normal work, find an example below:

Cheers~
DunHou

---

Result:

Code:

import c4d
import maxon
from Renderer import Redshift, EasyTransaction, TextureHelper

tex_helper: TextureHelper = TextureHelper()
disp: maxon.Url = tex_helper.GetAssetUrl("file_fa9c42774dd05049")

def HowToUse():

    material: c4d.BaseMaterial = Redshift.Material("MyMaterial")

    with EasyTransaction(material) as tr:

        tr.AddDisplacementTree(filepath = disp, shadername = "DISP")

        tr.InsertMaterial()

if __name__ == '__main__':
    HowToUse()

[Dunhou]

Hi community!

Here is a little example of how we modify aovs in Octane, find more examples in the top.

Have fun with it

Cheers~
DunHou

Result:

Codes:

import c4d
import maxon
import Renderer
from Renderer import Octane
from pprint import pprint

# How to create and modify octane aovs
def modify_octane_aov():

    # Get the doc host the aovs, in this case th active doc
    doc: c4d.documents.BaseDocument = c4d.documents.GetActiveDocument()
    # Set Octane AOVHelper instance
    aov_helper = Octane.AOV(doc)
    
    # Create a Octane aov item
    # the id can find from Renderer.constants.octane_id.py or in octane folder
    # If #name is None, defulat to type.
    diff_aov = aov_helper.create_aov_shader(aov_type = Octane.RNDAOV_DIFFUSE)

    # Add the DIFFUSE aov we just created to the Octane aov system
    aov_helper.add_aov(diff_aov)
    
    # Add some aovs
    aov_helper.add_aov(aov_helper.create_aov_shader(aov_type = Octane.RNDAOV_POST,aov_name = 'POST'))
    aov_helper.add_aov(aov_helper.create_aov_shader(Octane.RNDAOV_DIF_D))
    aov_helper.add_aov(aov_helper.create_aov_shader(Octane.RNDAOV_DIF_I))
    aov_helper.add_aov(aov_helper.create_aov_shader(Octane.RNDAOV_REFL_D))
    aov_helper.add_aov(aov_helper.create_aov_shader(Octane.RNDAOV_REFL_I))
    aov_helper.add_aov(aov_helper.create_aov_shader(Octane.RNDAOV_WIRE))
    aov_helper.add_aov(aov_helper.create_aov_shader(Octane.RNDAOV_OBJECT_LAYER_COLOR))
    aov_helper.add_aov(aov_helper.create_aov_shader(Octane.RNDAOV_VOLUME))
    
    # Remove last aov: volume
    aov_helper.remove_last_aov()
    
    # Remove specified aov: wire
    aov_helper.remove_aov_type(aov_type = Octane.RNDAOV_WIRE)
    
    # Add 2 custom aovs with id 1 and 2
    aov_helper.add_custom_aov(customID = 1)
    aov_helper.add_custom_aov(customID = 2)
    
    # Get the custom aov with id 2
    custom2 = aov_helper.get_custom_aov(customID = 2)
    if custom2:
        print(f'We find a Custom AOV with id 2 Named{custom2.GetName()}')
        
    # Print current aov info
    aov_helper.print_aov()


if __name__ == '__main__':
    Renderer.ClearConsole()
    modify_octane_aov()

[Dunhou]

Hi community!

Here is a little example of how we modify scene objects in Arnold, find more examples in the top.

We want:

• Add a Arnold Sky with hdr
• Add a gobo light with a node-base gobo material, and a IES light
• Add a cube and add a custom mask to the driver
• Add a Scatter with custom instance shapes
• Auto export proxy with a BaseObject and load back the ass file (need to save project first)

Have fun with it

Cheers~
DunHou

Results:

Codes:

import c4d
import maxon
import Renderer
from Renderer import Arnold, TextureHelper
from pprint import pprint

# Create a TextureHelper instance
tex_helper: TextureHelper = TextureHelper()

# How to create and modify arnold scene
def modify_arnold_scene():

    # Get the doc host the scene, in this case th active doc
    doc: c4d.documents.BaseDocument = c4d.documents.GetActiveDocument()
    # Set arnold SceneHelper instance
    scene_helper = Arnold.Scene(doc)
    
    ### == Light == ###
    # Add a rig of hdr and rgb backdrop
    hdr_url: str =  tex_helper.GetAssetStr(maxon.Id("file_d21cf4cfdec8c636"))
    scene_helper.add_dome_rig(texture_path = hdr_url, rgb = c4d.Vector(0,0,0))
    
    # Add a light object and and some modify tags
    gobo_url: maxon.Url = tex_helper.GetAssetUrl("file_66b116a34a150e7e")
    gobo_light = scene_helper.add_gobo(texture_path = str(gobo_url), intensity=2, exposure=0)
    scene_helper.add_light_modifier(light = gobo_light, gsg_link = True, rand_color = True)
    
    # Add a IES light
    ies_url: str = tex_helper.GetAssetStr("file_6f300f2ba077da4a")
    ies = scene_helper.add_ies(texture_path = ies_url, intensity=1, exposure=0)
    
    ### == Tag == ###
    # Add a Cude object and an arnold tag with mask_name
    cube = c4d.BaseObject(c4d.Ocube)
    scene_helper.add_mask_tag(node=cube, mask_name='My Mask 01')
    doc.InsertObject(cube)
        
    ### == Object == ###
    # Add a scatter obejct with some children and count 12345
    generate_object = c4d.BaseObject(c4d.Oplane)
    doc.InsertObject(generate_object)
    scatter_A = c4d.BaseObject(c4d.Oplatonic)
    scatter_B = c4d.BaseObject(c4d.Ooiltank)
    doc.InsertObject(scatter_A)
    doc.InsertObject(scatter_B)
    scatters: list[c4d.BaseObject] = [scatter_A, scatter_B]
    scene_helper.add_scatter(generator_node=generate_object, scatter_nodes=scatters, count=12345)
    
    # Add a object and set auto proxy
    the_object = c4d.BaseObject(c4d.Oplane)
    doc.InsertObject(the_object)
    the_object.SetName("Original Object")
    scene_helper.auto_proxy(nodes=the_object,remove_objects=False)

if __name__ == '__main__':
    Renderer.ClearConsole()
    modify_arnold_scene()
    c4d.EventAdd()

[Dunhou]

Hi community!

Another little update, as we didn't have DataDescriptionDatabaseInterface as @ferdinand said in How can we get the default port of a GraphNode?

I add a ConverterPorts to Renderer, we can use this to get the "default " port of a node until the DataDescriptionDatabaseInterface is valid in python.

Note: It can only provide the str data of the port and it's not 100% rigorous

Cheers~
DunHou

---

Result:

Codes:

import c4d
from Renderer import Redshift,EasyTransaction,ClearConsole

def ConvertTest():

    material: c4d.BaseMaterial = c4d.documents.GetActiveDocument().GetActiveMaterial()

    with EasyTransaction(material) as tr: 

        nodes = tr.GetActiveNodes()
        
        for node in nodes:
            print(f"Node: {tr.GetName(node)}")
            print(f"Default Input: {tr.GetConvertInput(node)}")
            print(f"Default Output: {tr.GetConvertOutput(node)}")
            print("-"*10)
        
if __name__ == '__main__':
    ClearConsole()
    ConvertTest()

[Dunhou]

Hi community!

I had add a basic support to V-Ray and Corona to fit the basic PBR usage, no Scene and AOV yet (AOV seems I can not get them in python, if someone knows where it stores, please let me know that).

Cheers~
DunHou

[m_adam]

Hi regarding Vray, I once wrote this plugin that have the duty to create ObjectId passes.
I did not try it since age, but previously Vray AOV where stored within a branch on the Render Engine.

I don't have vray installed currently, but I guess if you compile the C++ SDK, with the help of the C++ SDK Active Object Example it should be trivial to inspect a Vray scene and find these AOV.

Cheers,
Maxime

[Dunhou]

Hi community!

Thanks for @m_adam prompt, I had add a AOV to Vray as same as other renderers, see a basic example here, hope it can help

Cheer~
DunHou

---

Result:

Code:

import c4d
import Renderer
from Renderer import Vray

def modify_vray_aov():

    # Set Vray AOVHelper instance
    doc = c4d.documents.GetActiveDocument()
    vp: c4d.documents.BaseVideoPost = Renderer.GetVideoPost(doc, Renderer.ID_VRAY)    
    aov_helper = Vray.AOV(vp)

    # Add the DIFFUSE aov
    diff_aov = aov_helper.create_aov_shader(aov_type = Vray.VRAY_AOV_DIFFUSE)
    aov_helper.add_aov(diff_aov)

    # Add some aovs
    aov_helper.add_aov(aov_helper.create_aov_shader(aov_type = Vray.VRAY_AOV_BACKGROUND, aov_name = 'BG'))
    aov_helper.add_aov(aov_helper.create_aov_shader(Vray.VRAY_AOV_SPECULAR))
    aov_helper.add_aov(aov_helper.create_aov_shader(Vray.VRAY_AOV_REFLECTION))
    aov_helper.add_aov(aov_helper.create_aov_shader(Vray.VRAY_AOV_SHADOW))
    aov_helper.add_aov(aov_helper.create_aov_shader(Vray.VRAY_AOV_LIGHT_MIX))

    # Remove last aov
    aov_helper.remove_last_aov()

    # Remove specified aov: diffuse
    aov_helper.remove_aov_type(aov_type = Vray.VRAY_AOV_DIFFUSE[0])

    # Print current aov info
    aov_helper.print_aov()

    c4d.EventAdd()

if __name__ == '__main__':
    Renderer.ClearConsole()
    modify_vray_aov()

[Dunhou]

Hi again,

Also another Corona AOV example here .

Finally preliminarily implemented using this library to approximate the operation of the renderer in Cinema 4D .

The learning process was very enjoyable, hope you also have fun with it

Cheers~
DunHou

---

Result:

Code:

import c4d
import Renderer
from Renderer import Corona

def modify_corona_aov():

    # Get the doc host the aovs, in this case th active doc vp
    doc: c4d.documents.BaseDocument = c4d.documents.GetActiveDocument()
    vp: c4d.documents.BaseVideoPost = Renderer.GetVideoPost(doc, Renderer.ID_CORONA)
    # Set Corona AOVHelper instance
    aov_helper = Corona.AOV(vp)

    # turn on the mutipass
    aov_helper.enable_mutipass(True)
    
    # Add the DIFFUSE aov
    diff_aov = aov_helper.create_aov_shader(aov_type = Corona.CORONA_MULTIPASS_TYPE_ALBEDO)    
    aov_helper.add_aov(diff_aov)

    # Add some aovs
    aov_helper.add_aov(aov_helper.create_aov_shader(aov_type = Corona.CORONA_MULTIPASS_TYPE_EMISSION, aov_name = 'emmision aov'))
    aov_helper.add_aov(aov_helper.create_aov_shader(Corona.CORONA_MULTIPASS_TYPE_REFLECT))
    aov_helper.add_aov(aov_helper.create_aov_shader(Corona.CORONA_MULTIPASS_TYPE_REFRACT))
    aov_helper.add_aov(aov_helper.create_aov_shader(Corona.CORONA_MULTIPASS_TYPE_TRANSLUCENCY))
    aov_helper.add_aov(aov_helper.create_aov_shader(Corona.CORONA_MULTIPASS_TYPE_ZDEPTH))

    # Remove last aov: volume
    aov_helper.remove_last_aov()

    # Remove specified aov: wire
    aov_helper.remove_aov_type(aov_type = Corona.CORONA_MULTIPASS_TYPE_TRANSLUCENCY)

    # Print current aov info
    aov_helper.print_aov()

    Corona.AovManager()

if __name__ == '__main__':
    Renderer.ClearConsole()
    modify_aorona_aov()
    c4d.EventAdd()

[Dunhou]

Hi community!

New Updates here :

• Fix some Octane and Corona functions (base on layer)
• Add MaterialMaker and PBRPackage

PBRPackage means a suite of pbr textures, like a stone texture pack form PolyHaven or Megascan, you can provide the folder and the name to get the slot they should be:

• we have a texture pack named Rock Stone 01
• this package had some textures in D:/myTextures ,like Rock Stone 01_albedo.jpg/Rock Stone 01_Normal.png/Rock Stone 01_disp.exr.
• we can provide the folder like D:/myTextures and its name like Rock Stone 01
• then we get textures in a dictionary

data = {"diffuse": Rock Stone 01_albedo.jpg,
              "normal": Rock Stone 01_Normal.jpg,
              "displacement": Rock Stone 01_disp.jpg,
              etc...
}

Material Maker can easily add pbr materials from a package, and also you can use it with individuals textures.

But all of this build with this library, so only node materials on Redshift/Arnold/Vray, Octane and Corona is supported by thier own logics.

Cheers~
DunHou

[Dunhou]

Hi community!

Add Basic CentiLeo Material support, also with ConvertPorts data, This a "new" GPU Renderer and in active development. I am very interested in it.

Not add AOV due to still being in the early stages of development, waiting for this.

Cheers~
DunHou