C4D octane materials to redshift.

m0d.design

I am fairly new to python here and am trying to make a script to convert octane materials to redshift in C4D. I am however currently unsuccessful. I am using cinema 4D 2023.2.0 and the most recent release of redshift. For octane i am using 2022.1-R7. Any help would be really appreciated. Not sure if its just my IDs are wrong and the ones i'm getting aren't right or maybe the code is wrong too.

Current console output with script

Traceback (most recent call last):
  File "scriptmanager", line 93, in <module>
  File "scriptmanager", line 85, in main
  File "scriptmanager", line 53, in convert_octane_to_redshift
BaseException: could not allocate 'c4d.BaseMaterial (ID 1036219)' instance

Current version of the script

import c4d
from c4d import documents
from c4d import utils
from c4d import bitmaps

ID_OCTANE_MATERIAL = 1029501
ID_OCTANE_IMAGE_TEXTURE = 1029508
ID_OCTANE_COLORCORRECTION = 1029512
ID_OCTANE_INVERT_TEXTURE = 1029514
ID_OCTANE_MULTIPLY_TEXTURE = 1029516
ID_OCTANE_MIXTEXTURE = 1029505
mainLayerId = 526336

ID_REDSHIFT_MATERIAL = 1036219
ID_REDSHIFT_IMAGE = 1039749
ID_REDSHIFT_COLOR_SPLITTER = 1040084

def GetTexture(doc, oct_mat, channel):
    if not oct_mat.IsInstanceOf(ID_OCTANE_MATERIAL):
        return None

    image_name = None
    image_shader = oct_mat[channel]
    if image_shader:
        shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_MULTIPLY_TEXTURE:
            image_shader = image_shader[c4d.MULTIPLY_TEXTURE1]
            if image_shader:
                shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_MIXTEXTURE:
            image_shader = image_shader[c4d.MIXTEX_TEXTURE1_LNK]
            if image_shader:
                shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_COLORCORRECTION:
            image_shader = image_shader[c4d.COLORCOR_TEXTURE_LNK]
            if image_shader:
                shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_INVERT_TEXTURE:
            image_shader = image_shader[c4d.INVERT_TEXTURE]
            if image_shader:
                shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_IMAGE_TEXTURE:
            image_name = image_shader[c4d.IMAGETEXTURE_FILE]
            print(image_name)
    return image_name

def convert_octane_to_redshift(doc, octane_material):
    redshift_material = c4d.BaseMaterial(ID_REDSHIFT_MATERIAL)
    if not redshift_material:
        raise BaseException("could not allocate 'c4d.BaseMaterial (ID 1036219)' instance")

    redshift_material.SetName(octane_material.GetName())
    doc.InsertMaterial(redshift_material)

    diff_file = GetTexture(doc, octane_material, c4d.OCT_MATERIAL_DIFFUSE_LINK)
    if diff_file:
        diff_bitmap = bitmaps.BaseBitmap()
        diff_bitmap.InitWith(diff_file)
        diff_image = utils.BitmapToRSBitmap(diff_bitmap)
        if diff_image:
            diff_shader = c4d.BaseShader(ID_REDSHIFT_IMAGE)
            diff_shader[c4d.REDSHIFT_SHADER_IMAGE] = diff_image
            redshift_material[c4d.REDSHIFT_SHADER_MATERIAL_DIFFUSE_COLOR] = diff_shader
            redshift_material.InsertShader(diff_shader)

            color_splitter = c4d.BaseShader(ID_REDSHIFT_COLOR_SPLITTER)
            color_splitter[c4d.REDSHIFT_SHADER_COLOR_SPLITTER_INPUT] = diff_shader
            redshift_material[c4d.REDSHIFT_SHADER_MATERIAL_OPACITY_COLOR] = color_splitter
            redshift_material.InsertShader(color_splitter)

    return redshift_material

def main():
    doc = documents.GetActiveDocument()
    selected_materials = doc.GetActiveMaterials()

    for mat in selected_materials:
        if mat.IsInstanceOf(ID_OCTANE_MATERIAL):
            doc.StartUndo()
            new_rs_mat = convert_octane_to_redshift(doc, mat)
            doc.AddUndo(c4d.UNDOTYPE_NEW, new_rs_mat)
            doc.AddUndo(c4d.UNDOTYPE_DELETE, mat)
            doc.RemoveMaterial(mat)
            doc.EndUndo()
            c4d.EventAdd()

if __name__ == '__main__':
    main()

m_adam

Hi @m0d-design out of curiosity is this coming from chat GPT?

There is multiple thing wrong in your code, first of all we can't help you with the octane API, so to retrieve the data from an octane material please contact otoy directly. To create a redshift material you can find an example in Create a RS Standard Material with a Texture node connected to the Color and also wired up to a color splitter that it is connected to the opacity..

Cheers,
Maxime.

m0d.design

It is, ive been hand holding gpt while it structures it. Of course its out of date though unfortunately. It struggles the most with redshift scripts, for some reason it doesn't properly know how to create a material. I did some digging and found that post you shared before posting here to try and use it. However im not skilled enough yet in python or in the knowledge of the plugins to that extent to structure it myself. GPT and I did manage to make a working conversion script for octane to C4D native materials though with some lengthy troubleshooting. Don't know if this would help with the current topic at hand at all. But either way I appreciate the reply.

import c4d
from c4d import documents

ID_OCTANE_MATERIAL = 1029501
ID_OCTANE_IMAGE_TEXTURE = 1029508
ID_OCTANE_COLORCORRECTION = 1029512
ID_OCTANE_INVERT_TEXTURE = 1029514
ID_OCTANE_MULTIPLY_TEXTURE = 1029516
ID_OCTANE_MIXTEXTURE = 1029505
mainLayerId = 526336


def CheckSelection(doc, mats):
    oct_mats = []
    if mats:
        count = len(mats)
        for i in range(count):
            if mats[i].GetType() == ID_OCTANE_MATERIAL:
                oct_mats.append(mats[i])
    return oct_mats

def GetTexture(doc, oct_mat, channel):
    image_name = None
    image_shader = oct_mat[channel]
    if image_shader:
        shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_MULTIPLY_TEXTURE:
            image_shader = image_shader[c4d.MULTIPLY_TEXTURE1]
            if image_shader:
                shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_MIXTEXTURE:
            image_shader = image_shader[c4d.MIXTEX_TEXTURE1_LNK]
            if image_shader:
                shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_COLORCORRECTION:
            image_shader = image_shader[c4d.COLORCOR_TEXTURE_LNK]
            if image_shader:
                shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_INVERT_TEXTURE:
            image_shader = image_shader[c4d.INVERT_TEXTURE]
            if image_shader:
                shader_type = image_shader.GetType()

        if shader_type == ID_OCTANE_IMAGE_TEXTURE:
            image_name = image_shader[c4d.IMAGETEXTURE_FILE]
            print(image_name)
    return image_name

def ReAssign(doc, oct_mat, c4d_mat):
    obj_link = oct_mat[c4d.ID_MATERIALASSIGNMENTS]
    link_count = obj_link.GetObjectCount()
    for i in range(link_count):
        tex_tag = obj_link.ObjectFromIndex(doc, i)
        doc.AddUndo(c4d.UNDOTYPE_CHANGE, tex_tag)
        tex_tag[c4d.TEXTURETAG_MATERIAL] = c4d_mat
        tex_tag.Message(c4d.MSG_CHANGE)

def RebuildMats(doc, oct_mats):
    c4d_mats = []
    count = len(oct_mats)
    for i in range(count):
        oct_mat = oct_mats[i]
        c4d_mat = c4d.BaseMaterial(c4d.Mmaterial)
        name = oct_mat[c4d.ID_BASELIST_NAME]
        c4d_mat[c4d.ID_BASELIST_NAME] = name

        diff_file = GetTexture(doc, oct_mat, c4d.OCT_MATERIAL_DIFFUSE_LINK)
        if diff_file:
            diff_shader = c4d.BaseShader(c4d.Xbitmap)
            diff_shader[c4d.BITMAPSHADER_FILENAME] = diff_file
            c4d_mat[c4d.MATERIAL_COLOR_SHADER] = diff_shader
            c4d_mat.InsertShader(diff_shader)

        opac_file = GetTexture(doc, oct_mat, c4d.OCT_MATERIAL_OPACITY_LINK)
        if opac_file:
            opac_shader = c4d.BaseShader(c4d.Xbitmap)
            opac_shader[c4d.BITMAPSHADER_FILENAME] = opac_file
            c4d_mat[c4d.MATERIAL_ALPHA_SHADER] = opac_shader
            c4d_mat.InsertShader(opac_shader)
            c4d_mat[c4d.MATERIAL_USE_ALPHA] = True


        normal_file = GetTexture(doc, oct_mat, c4d.OCT_MATERIAL_NORMAL_LINK)
        if normal_file:
            normal_shader = c4d.BaseShader(c4d.Xbitmap)
            normal_shader[c4d.BITMAPSHADER_FILENAME] = normal_file
            c4d_mat[c4d.MATERIAL_NORMAL_SHADER] = normal_shader
            c4d_mat.InsertShader(normal_shader)
            c4d_mat[c4d.MATERIAL_USE_NORMAL] = True

        bump_file = GetTexture(doc, oct_mat, c4d.OCT_MATERIAL_BUMP_LINK)
        if bump_file:
            bump_shader = c4d.BaseShader(c4d.Xbitmap)
            bump_shader[c4d.BITMAPSHADER_FILENAME] = bump_file
            c4d_mat[c4d.MATERIAL_BUMP_SHADER] = bump_shader
            c4d_mat.InsertShader(bump_shader)
            c4d_mat[c4d.MATERIAL_USE_BUMP] = True

        rough_file = GetTexture(doc, oct_mat, c4d.OCT_MATERIAL_ROUGHNESS_LINK)
        if rough_file:
            rough_shader = c4d.BaseShader(c4d.Xbitmap)
            rough_shader[c4d.BITMAPSHADER_FILENAME] = rough_file
            c4d_mat[c4d.MATERIAL_USE_REFLECTION] = True
            c4d_mat[mainLayerId + c4d.REFLECTION_LAYER_MAIN_DISTRIBUTION] = 2
            c4d_mat[mainLayerId + c4d.REFLECTION_LAYER_MAIN_SHADER_ROUGHNESS] = rough_shader
            c4d_mat.InsertShader(rough_shader)

        ReAssign(doc, oct_mat, c4d_mat)

        c4d_mats.append(c4d_mat)
        doc.InsertMaterial(c4d_mat)
        doc.AddUndo(c4d.UNDOTYPE_NEW, c4d_mat)

    return


def main():
    my_doc = documents.GetActiveDocument()
    my_mats = my_doc.GetActiveMaterials()
    my_oct_mats = CheckSelection(my_doc, my_mats)

    if my_oct_mats:
        doc.StartUndo()
        RebuildMats(my_doc, my_oct_mats)
        doc.EndUndo()
        c4d.EventAdd()


if __name__ == '__main__':
    main()

Smolak

Unfortunately this script doesn't include Specular and Displacement channels conversion.