What is 2D image in 3D modeling midjourney?

In 3D modeling midjourney, a 2D image acts as a reference, texture source, or guide to shape, detail, or texture 3D assets. It translates 2D ideas (like concept art, photos, or sketches) into 3D—e.g., using a character sketch to match proportions or a wood photo as a table texture. For ease, overlay 2D references in software (such as Blender’s background images) to align 3D shapes with 2D guides quickly.