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How do I get the Color value from an RGB node with Python?

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6

1

$begingroup$

I'm a seasoned programmer, but fairly new to blender and 3D-modeling in general. So to get an understanding of different properties I want to write python scripts to create multiple renderings with different settings of various values.

In the example below I have figured out how to change the Volume Absorption Density, ex:

bpy.data.materials['MyMaterial'].node_tree.nodes['Volume Absorption'].inputs['Density'].default_value = 100

But not the RGB-node. It seems I cant even get the current values out of it. Some things I have tried:

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color.r

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color.outputs['Color']

How do I get and set output values of the RGB-node in py python-script?

python scripting nodes

share|improve this question

edited 22 hours ago

Ray Mairlot

22.3k56395

asked 23 hours ago

UlfRUlfR

1334

New contributor

UlfR is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  just fyi here's a script showing how you can build your nodes directly from python: blender.stackexchange.com/q/35436/5334 and here's another blender.stackexchange.com/q/34609/5334
  $endgroup$
  – uhoh
  17 hours ago
  

  
  
  
  

add a comment | 

6

1

$begingroup$

I'm a seasoned programmer, but fairly new to blender and 3D-modeling in general. So to get an understanding of different properties I want to write python scripts to create multiple renderings with different settings of various values.

In the example below I have figured out how to change the Volume Absorption Density, ex:

bpy.data.materials['MyMaterial'].node_tree.nodes['Volume Absorption'].inputs['Density'].default_value = 100

But not the RGB-node. It seems I cant even get the current values out of it. Some things I have tried:

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color.r

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color.outputs['Color']

How do I get and set output values of the RGB-node in py python-script?

python scripting nodes

share|improve this question

edited 22 hours ago

Ray Mairlot

22.3k56395

asked 23 hours ago

UlfRUlfR

1334

New contributor

UlfR is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  just fyi here's a script showing how you can build your nodes directly from python: blender.stackexchange.com/q/35436/5334 and here's another blender.stackexchange.com/q/34609/5334
  $endgroup$
  – uhoh
  17 hours ago
  

  
  
  
  

add a comment | 

$begingroup$

I'm a seasoned programmer, but fairly new to blender and 3D-modeling in general. So to get an understanding of different properties I want to write python scripts to create multiple renderings with different settings of various values.

In the example below I have figured out how to change the Volume Absorption Density, ex:

bpy.data.materials['MyMaterial'].node_tree.nodes['Volume Absorption'].inputs['Density'].default_value = 100

But not the RGB-node. It seems I cant even get the current values out of it. Some things I have tried:

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color.r

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color.outputs['Color']

How do I get and set output values of the RGB-node in py python-script?

python scripting nodes

share|improve this question

edited 22 hours ago

Ray Mairlot

22.3k56395

asked 23 hours ago

UlfRUlfR

1334

New contributor

UlfR is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

bpy.data.materials['MyMaterial'].node_tree.nodes['Volume Absorption'].inputs['Density'].default_value = 100

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color.r

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].color.outputs['Color']

share|improve this question

edited 22 hours ago

Ray Mairlot

22.3k56395

asked 23 hours ago

UlfRUlfR

1334

New contributor

UlfR is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 22 hours ago

Ray Mairlot

22.3k56395

asked 23 hours ago

UlfRUlfR

1334

New contributor

UlfR is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 22 hours ago

Ray Mairlot

22.3k56395

edited 22 hours ago

Ray Mairlot

22.3k56395

asked 23 hours ago

UlfRUlfR

1334

New contributor

UlfR is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 23 hours ago

UlfRUlfR

1334

2 Answers
2

active

oldest

votes

10

$begingroup$

^{Welcome to Blender.SE, UlfR.}

Finding out a property in Blender is relatively easy. Make sure, you have python tooltips enabled (in the user preferences).

Then hover your mouse cursor over the property (in this case the color). A tooltip containing the python command will appear.

The property you seek seems to be outputs[0].default_value.

def_rgb = bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].outputs[0].default_value

It is a bpy_prop_array by default, so you may want to convert it to a list.

float_values = list(def_rgb)

share|improve this answer

answered 22 hours ago

LeanderLeander

12.2k11550

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Miceterminator beat me to it by 3 minutes. I will leave this answer up, as it mentions the python tooltip and his doesn't you could accept his answer as the correct one however.
  $endgroup$
  – Leander
  22 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  my problem was that bpy.data.materials[1].node_tree.nodes['RGB'].outputs[0].default_value = (1.0,1.0,0.5,1.0) works but bpy.data.materials[1].node_tree.nodes['RGB'].outputs[0].default_value produces nothing in the Python console. Converting it to list then displayed the hidden values.
  $endgroup$
  – rob
  22 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  You can also access the individual values directly from the bpy_prop_array via their indices, such as def_rgb[0].
  $endgroup$
  – Leander
  12 hours ago
  
  
  

  
  
  
  

add a comment | 

6

$begingroup$

As you already found you way to the node tree, the "Copy data path" option is generally very helpful:

Right click on the field you want to access and use the "Copy data path" option.

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].outputs[0].default_value

You can also look at the answers here and here

share|improve this answer

edited 22 hours ago

answered 22 hours ago

miceterminatormiceterminator

1,95621124

$endgroup$

add a comment | 

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10

$begingroup$

^{Welcome to Blender.SE, UlfR.}

Finding out a property in Blender is relatively easy. Make sure, you have python tooltips enabled (in the user preferences).

Then hover your mouse cursor over the property (in this case the color). A tooltip containing the python command will appear.

The property you seek seems to be outputs[0].default_value.

def_rgb = bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].outputs[0].default_value

It is a bpy_prop_array by default, so you may want to convert it to a list.

float_values = list(def_rgb)

share|improve this answer

answered 22 hours ago

LeanderLeander

12.2k11550

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Miceterminator beat me to it by 3 minutes. I will leave this answer up, as it mentions the python tooltip and his doesn't you could accept his answer as the correct one however.
  $endgroup$
  – Leander
  22 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  my problem was that bpy.data.materials[1].node_tree.nodes['RGB'].outputs[0].default_value = (1.0,1.0,0.5,1.0) works but bpy.data.materials[1].node_tree.nodes['RGB'].outputs[0].default_value produces nothing in the Python console. Converting it to list then displayed the hidden values.
  $endgroup$
  – rob
  22 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  You can also access the individual values directly from the bpy_prop_array via their indices, such as def_rgb[0].
  $endgroup$
  – Leander
  12 hours ago
  
  
  

  
  
  
  

add a comment | 

10

$begingroup$

^{Welcome to Blender.SE, UlfR.}

Finding out a property in Blender is relatively easy. Make sure, you have python tooltips enabled (in the user preferences).

Then hover your mouse cursor over the property (in this case the color). A tooltip containing the python command will appear.

The property you seek seems to be outputs[0].default_value.

def_rgb = bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].outputs[0].default_value

It is a bpy_prop_array by default, so you may want to convert it to a list.

float_values = list(def_rgb)

share|improve this answer

answered 22 hours ago

LeanderLeander

12.2k11550

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Miceterminator beat me to it by 3 minutes. I will leave this answer up, as it mentions the python tooltip and his doesn't you could accept his answer as the correct one however.
  $endgroup$
  – Leander
  22 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  my problem was that bpy.data.materials[1].node_tree.nodes['RGB'].outputs[0].default_value = (1.0,1.0,0.5,1.0) works but bpy.data.materials[1].node_tree.nodes['RGB'].outputs[0].default_value produces nothing in the Python console. Converting it to list then displayed the hidden values.
  $endgroup$
  – rob
  22 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  You can also access the individual values directly from the bpy_prop_array via their indices, such as def_rgb[0].
  $endgroup$
  – Leander
  12 hours ago
  
  
  

  
  
  
  

add a comment | 

$begingroup$

^{Welcome to Blender.SE, UlfR.}

Finding out a property in Blender is relatively easy. Make sure, you have python tooltips enabled (in the user preferences).

Then hover your mouse cursor over the property (in this case the color). A tooltip containing the python command will appear.

The property you seek seems to be outputs[0].default_value.

def_rgb = bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].outputs[0].default_value

It is a bpy_prop_array by default, so you may want to convert it to a list.

float_values = list(def_rgb)

share|improve this answer

answered 22 hours ago

LeanderLeander

12.2k11550

$endgroup$

def_rgb = bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].outputs[0].default_value

float_values = list(def_rgb)

share|improve this answer

answered 22 hours ago

LeanderLeander

12.2k11550

answered 22 hours ago

LeanderLeander

12.2k11550

answered 22 hours ago

LeanderLeander

12.2k11550

6

$begingroup$

As you already found you way to the node tree, the "Copy data path" option is generally very helpful:

Right click on the field you want to access and use the "Copy data path" option.

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].outputs[0].default_value

You can also look at the answers here and here

share|improve this answer

edited 22 hours ago

answered 22 hours ago

miceterminatormiceterminator

1,95621124

$endgroup$

add a comment | 

6

$begingroup$

As you already found you way to the node tree, the "Copy data path" option is generally very helpful:

Right click on the field you want to access and use the "Copy data path" option.

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].outputs[0].default_value

You can also look at the answers here and here

share|improve this answer

edited 22 hours ago

answered 22 hours ago

miceterminatormiceterminator

1,95621124

$endgroup$

add a comment | 

$begingroup$

As you already found you way to the node tree, the "Copy data path" option is generally very helpful:

Right click on the field you want to access and use the "Copy data path" option.

bpy.data.materials['MyMaterial'].node_tree.nodes['RGB'].outputs[0].default_value

You can also look at the answers here and here

share|improve this answer

edited 22 hours ago

answered 22 hours ago

miceterminatormiceterminator

1,95621124

$endgroup$

share|improve this answer

edited 22 hours ago

answered 22 hours ago

miceterminatormiceterminator

1,95621124

answered 22 hours ago

miceterminatormiceterminator

1,95621124

answered 22 hours ago

miceterminatormiceterminator

1,95621124