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How to create the generated "UV Grid" texture with the help of the Blender Python API?

Florian Ludewig
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2 Answers2

3

Either generate a checkerboard and assign the pixels to a new image data block or just call bpy.ops.image.new() and pass UV_GRID:

enter image description here

One downside of using the operator is that you would have to supply a reliable (unique) name for the image data block otherwise it automatically gets renamed to Untitled.001, Untitled.002... due to Blender's nature of handling data:

import bpy
import secrets

Generate "unique" name


image_name = secrets.token_hex(5)


Call the operator


bpy.ops.image.new(
        name=image_name, 
        width=1024, 
        height=1024, 
        color=(0.0, 0.0, 0.0, 1.0), 
        alpha=True, 
        generated_type='UV_GRID', # BLANK, COLOR_GRID
        float=False, 
        use_stereo_3d=False, 
        tiled=False
    )


Get the image from data blocks


image = bpy.data.images.get(image_name)


Display the result


if image:
    bpy.ops.screen.userpref_show('INVOKE_DEFAULT')
    # Change area type
    area = bpy.context.window_manager.windows[-1].screen.areas[0]
    area.type = 'IMAGE_EDITOR'


# Assign the image
bpy.context.area.spaces.active.image = image

Related:

brockmann
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1

It's also possible to create a new image containing the "UV Grid" or the "Color Grid" directly, without using the bpy.ops.image.new(...) operator:

import bpy

Create the image


img = bpy.data.images.new(
        name='some name',
        width=1024,
        height=1024,
        # Further arguments are optional and this are the defaults:
        alpha=False,
        float_buffer=False,
        stereo3d=False,
        is_data=False,
        tiled=False
    )


Setup the grid


img.source = 'GENERATED'  # optional, since it's done implicitly
img.generated_type = 'UV_GRID'  # alternatively use 'COLOR_GRID' here
Febulix
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