Pre-Displacement Texture Coordinates

1: The Problem

Currently, the texture coordinate node gives the texture coordinates after the displacement, unless used for the displacement.

This means that the displacement and the procedural texture may not be aligned .

I'm sure that this is a common problem, though not everybody may understand it.

A workaround that can be used is to set texture nodes to be 2D, but this only works well if you have a UV or a flat geometry.

EDIT:

The previous workaround only works on flat geometry. Instead, you can try using different texture coordinate options.

2: Possible Solutions

Option 1

A toggle is added to the 'Texture Coordinate' node for whether it is processed before or after displacement.

Option 2

A new output is added to the node, giving the 'Object' coordinate prior to displacement.

EDIT:

Here is a comparison between using 2 different texture coordinate options for reference. 'Object' texture coordinate is the one which needs this improvement the most. Both images use an ico-sphere with a radius of 1m.

Object:

As you can see, the displacement and the base colour noise is way out of alignment.

Normal:

Here, using a different texture coordinate option, the issue can be very much minimized. This solution will only work well on a sphere.

Edit: You can get the behavior of the proposed setting by capturing the texture coordinate in geometry nodes as a named attribute, (use 'position' node for Object texture coordinate), then referencing the named attribute in the shader nodes.

Geometry Nodes:

Shader Nodes:

Render: