When working with THREE JS, I've noticed that it tends to have a very angular and straight-edged look. Although I haven't been using it for long, I am struggling to figure out how to give the world a more curved appearance. My goal is to take a 2D map and transform it into a simple running game with three lanes. Looking at the image below from a similar game, I'm wondering how I can achieve a fish eye effect.
https://i.sstatic.net/iUVPg.jpg
(source: applenapps.com)
Implementing this type of effect on a per-vertex basis can really enhance the visual experience, especially when considering the proximity to the camera. Additionally, adjusting the perspective camera to have a larger vertical field of view could further amplify the "curviness" effect. While it may appear to be a curved distortion, in reality, it is likely just simulated. I trust this information proves useful.
There are numerous ways to achieve a barrel distortion effect, but one method involves rendering a wide angle camera to a texture and projecting it onto a lens-shaped plane or sphere. This allows for an on-screen render from a camera directed towards the distorted image.
If you're interested, I can locate the code for this technique in a few days. Alternatively, you could source inspiration from three.js examples which demonstrate similar postprocessing effects. By modifying the ortographic camera to a perspective one and adjusting the shape of the quad appropriately, you can create unique distortions.
It's worth noting that pushing this approach to its limits may result in pixelation or blocky artifacts in the final image.
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