Hello! In this Instructable, I will show you how to make a miniature version of the BFG 9000. I based off the design of the BFG 9000 from Doom Eternal. This design is 8/75 scale model of the original BFG 9000. If you plan to make this on your own, expect it to take a decently long time. Some of the things I describe in the steps are too complicated to say in words, so if you are having trouble, just look at the pictures I made, or go to the my design, which is linked in the seventh step.

If you plan on making this on your own, I recommend searching up images of the BFG 9000 to help you as you make your design.

Supplies

All you need to make this design is TinkerCAD

Step 1: Step One: Stock Skeleton

First, create a skeleton of the BFG 9000. This will help you visualize the BFG, as well as too get a sort of idea of what your design will turn out to be. Making a skeleton for your 3D design serves as a rough draft of what you are going to make. In this first step, I made the first part of the skeleton, the stock. I made multiple parts that would make the stock. In the images above, you can see the parts that I used. Once you are done making the parts, combine them. During this step, once you have combined the parts, you can shape the skeleton to be more refined, so that it more closely resembles the shape of the BFG 9000. The image in the bottom right corner is the final result.

Step 2: Step Two: the Barrel/Cannon Skeleton

In this step, we will make the barrel of the BFG. Just like the previous step, make the base of the first, and then refine the shape and add any large details. Also just like in the last step, I made multiple steps that would combine and make the barrel. This skeleton does not closely resemble the original design of the BFG, but it shouldn't, so it is fine if your skeleton does not look like the BFG yet. The image above at the bottom left is the final product.

Step 3: Step Three: Refine Barrel Skeleton

In this step, I worked on refining the shape of the barrel, and I also added some other parts to the BFG to make it look more similar to the original. I also further shaped the design using the "hole" shapes in TinkerCAD. Also, I made a hole within the BFG for further detailing later. This step may take a while because of the small parts and details you will need to add. You can look at the images above to see what I did.

Step 4: Step Four: Refine Stock Skeleton

In this step, do the same thing as in the previous step, but instead for the stock. The stock should not take as long as the barrel because there is less detail on them. You can look at the images above to see what I did.

Step 5: Step Five: Combine and Detail

In this step, combine the stock and the barrel. These two parts can overlap, but not to the point that they are covering up details on each other. Once you have combine them, you can start to add some details, such as prints, patterns, and other things that you would find on the BFG. You may also need to cut into the design with the hole function in TinkerCAD to create space for tubes, power cells, and other stuff. During this process, you can also change the colors of the shapes so that the colors now resemble the original design of the BFG.

Step 6: Step Six: More Detail and Parts

In this step, I created and added some parts. I also filled in the hole that I made earlier in the BFG, and filled it in with a power cell, and I also filled in the hole in the front/barrel of the BFG. You can also make any other parts of the BFG I missed and add it to your own design.

Step 7: Step Seven: Finishing Touces

In this step, I finish up the BFG 9000 by cutting some of the corners and making it look more streamline. I also shape some of the areas to add more detail. Once you have finished this step, you are done making the BFG 9000. The next step is optional, and I just make a base to hold the BFG. Otherwise, you are done! (the 3 images without the hole shapes are the final product BFG 9000)

Link to my design: https://www.tinkercad.com/things/b8wWlbeu245-bfg-9000/edit (if the link does not work please tell me in the comments)

Step 8: Step 8: Base

In this step, I made a simple base for the BFG 9000. All I did was I used a torus and turned it into a hole, then used it on a cylinder that was slightly taller than the torus, and grouped them. Then I placed a torus whos top I had cut off using a hole square, and then placed that torus on the cylinder. I also placed two thin cylinders in the base that would hold up the BFG 9000.