I cannot set material in my object

[MayconSilva7]

Hello,

I have been trying to set a material in a plane in my script like ”Material Manipulation example“. But I got the error ”No element with the given condition has been found.“ I using VSCode on Windows, and the line “set_displacement_from_principled_shader_value“ does not recognize as a function.

Follows the code

#Blenderproc testing 
#Creating a complete scene


#Importing module 
import blenderproc as bproc
import numpy as np
import os
import sys
import random
import csv
import pandas as pd
import bpy

#Initialize with method init 
bproc.init()

# Create a simple object:
obj = bproc.object.create_primitive("PLANE")   # define the object type
obj.set_location([-1, 0, 0.5])                    # set object location
obj.set_rotation_euler([np.pi/2, 0, 0])         # set object rotation

obj2 = bproc.object.create_primitive("PLANE")   # define the object type
obj2.set_location([-1, 0, 3])                    # set object location
obj2.set_rotation_euler([np.pi/2, 0, 0]) 


# Find object with name Plane
plane = bproc.filter.one_by_attr(obj, "name", "Plane")

# Find all materials
materials = bproc.material.collect_all()

# Find the material of the ground object
plane_material = bproc.filter.one_by_attr(materials, "name", "Material.001")

# Set its displacement based on its base color texture
plane_material.set_displacement_from_principled_shader_value("metallic", multiply_factor=1)

# Create a point light next to it
light = bproc.types.Light()    
light.set_type("SPOT")
light.set_location([0, 0, 10])
light.set_energy(1000)    #10 GW

#Read the csv file with drone positions and create the vector
with open('cor.csv') as csvfile:
    loc = [(int(x), int(y), int(z)) for x, y, z in csv.reader(csvfile, delimiter= ',')]   #create the vector loc to the location

#set camera sampling (position)

i = 1
cam_pose = bproc.math.build_transformation_mat(loc[i], [np.pi / 2, 0, 0])    #function camera - matrix (location, rotation)
bproc.camera.add_camera_pose (cam_pose)

#Render the scene

data = bproc.renderer.render()

# Write the rendering into an hdf5 file
bproc.writer.write_hdf5("output/", data)

[cornerfarmer]

Hey @MayconSilva7,

the input_name has to be exactly like how it is specified in blender, meaning it should be uppercase:

plane_material.set_displacement_from_principled_shader_value("Metallic", multiply_factor=1)

Let me know if this works

[cornerfarmer]

In blender each object has one or multiple material slots where you can assign materials (see https://docs.blender.org/manual/en/latest/render/materials/assignment.html).
By calling obj.set_material(0, mat) you would overwrite the material that was assigned at slot 0 with the given material.
If an object does not have any materials assigned yet, its better to call obj.add_material(mat).

[MayconSilva7]

Thank you very much, I solved it and I understand.

[MayconSilva7]

I have doubt in "def set_color(self, color: Union[list, Color], frame: Optional[int] = None)", how to use "union". Do I need to open another discussion ?

[cornerfarmer]

Union is just part of the type hint (see https://docs.python.org/3/library/typing.html#typing.Union)

It means, either a Color or a list

[MayconSilva7]

I have open another discussion, it is about use bpy and Blender Python Console.