What happens when a drawing becomes a 3D model?

The penguin illustrator only had to draw the front edge of a yellow cap. A 3D viewer also needs something to show beneath the brim, behind the head and on the far side of the red bag. Single-image generation estimates those surfaces from the visible reference.

Look at the shape first

A mesh is a set of connected faces that gives an object its shape. Open the Penguin Postman example, turn it a quarter turn, and watch the beak move past the outline of the face. The thickness of the beak and bag becomes visible as the viewing angle changes. Then turn to the back. The input illustration gives no direct view of that surface.

Look at what stays on the surface

Texture supplies color and markings. The dark blue body, yellow cap and coral bag make the character recognizable. In this Standard-texture result the highlights give the figure a glossy, toy-like appearance. Check whether that material suits your project, even when the colors and silhouette match.

Decide what the next input should show

If the hidden side can be interpreted freely, a single image is a practical starting point. If your character has a badge or a particular seam on the back, provide that angle using multi-view input. Raising texture quality alone cannot tell the generator what the badge looks like.