mortal parrot
The idea of the node is to take a simple white on black mask (or you can invert in the node if you have black on white) and create a "fake" depth map from it as though the shape had been extruded along some angle in the z-direction.
The created depth map can then easily be used as input to a depth ControlNet.
This node combines well with @versed sleet 's Text Mask (Simple 2D) node, which creates a text mask. This node then turns the text into a depth map and the depth ControlNet renders it in 3D with your style given by your prompt.
Example:
I chose an @ sign as an example here. The @ is black on white so I toggled in the invert input. Note the three images are the original text mask, the created depth map, and the final result using the depth map with depth ControlNet.
spark imp