Tinkering with pinholes and 3d renders

tinkering with pinholes - a silly little 3d rendering experiment.

A month ago an idea came to my mind - could I recreate a pinhole camera with a 3d renderer? Today I decided to find out! :D

A pinhole camera is a very simple camera which uses a little hole to focus light rays onto a plane which create an image. 

here's a diagram of a pinhole camera. Pretty cool, right?

I will be using blender and the Cycles renderer.

and here's the pinhole camera I created:

I gave the back side of the camera a white material and black to the rest. Doing so greatly increases the render time and probably improves the image quality.

Now I had to test this camera out so I created a simple scene:

Here are the renders I got out of this project (2000 samples):

the first image has the denoising feature turned on.

They are very noisy and aren't focused on the monkey but I love them. In conclusion, I would say that my idea works (why wouldn't it? :D) and I am very happy with the results. I could improve this camera but I'm lazy lol and it would take way too much time...

I think the results would be better if I used more samples. I tried to use more samples but it made the image way darker? I'm not sure how to fix that. :/

I would love to read some feedback on how I could improve my pinhole camera :)