I need a 3D model of the attached sketch for a presentation

Industry: Art and Design
Design details: We would like to include a 3D model of an image in a presentation showing an exhibition stand that we are proposing.

The image is of a cube shape, made from galvanised steel poles, similar to this: https://www.themetalstore.co.uk/products/galvanised-tube - the poles would be painted matt black.

Over the poles are black fabric which drape down each side and over the top. At the back is black fabric draping down the back only. The cube is 3m x 3m x 3m.

The fabric does not let much light through, so it creates quite a dark cube inside. The front is left open.

The corner of each tube is using a corner clamp - https://www.themetalstore.co.uk/products/tube-clamp

The foot of the tube has a rubber foot - it is called Plastic Stop End on https://www.themetalstore.co.uk/products/tube-clamp

I would like an image to use in the presentation, but it is not necessary for it to be photo-realistic, just good quality to help the exhibition imagine what it might look like installed.

The image could be 300dpi, and approximately 20cm x 20cm when finished.

Attached are some sketches showing the frame, the first fabric and then the complete model to give an idea of what it should look like.
Ideas for the visual style: Similar style to http://www.turbosquid.com/3d-models/crate-led/747614 in just a white room with the angle of the cube.
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