Hi guys! I'm new to Photoshop, and I want to know how to create a 3d scene.

Question

I have a class in school where I need to create a 3D model of a scene. anyone know how to turn this into 3d?

Answer 1

Use the shape tools, like the pen tool for example and trace the back wall, then as a separate shape trace each side wall, the shape can be fill with a color. Then convert the shapes to 3d. Don't forget about the ceiling and the floor.
The register will be a separate shape (this would be a good time to remove the slats in the register, before conversion.
Speaking of removing, you can remove the door location from the wall before conversion as well.
Then you can create a shape for the front of the door and the front of the door casing.
Keep in mind that objects on the side are skewed, so you need to create unskewed shapes and allow the 3d process handle how it looks in the final render. (other wise, your door, the hole for the door and the door casing will not look right.
So basically you are tracing the front of all the objects, then photoshop handles the depth of the objects. (by front I meant what you would see by rotating your head around the room not from the picture)
The fire hydrant is basically a cylinder, which photoshop can create for you, the top discharge handle on the other hand may be beyond doing, you can try it, but you may give up, since photoshop is not really equipped to create odd shapes. (If it comes down to it, it would be better to make a simplistic shape two rectangle for top and bottom handle and a cylinder for the spout and a cylinder for holding the handle up from the hydrant. And call it a day )
Door knob is a basic cylinder plus a smaller cylinder behind the knob to extend it from the door.
The phone and cigarettes are nothing more than basic rectangles.
I don't know if you caught on yet, but I am describing basic primitives which you build upon. Always try to break down an object to it most basic primitives. I assume you are familiar with geometry. A primitive is a rectangle, triangle, cylinder, sphere, cube, circle, etc.
You should find some videos on youtube, adobe tv and kelby tv about 3d modeling.