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This AR game was developed as a Mini-game, a bonus for dedicated players.
The whole game was developed entirely by me, including art and UX, and was finished in 3 weeks of work.
As this was my first attempt of making an entire AR game from scratch, to save time I decided to use Vuforia technology for Unity.
I first envisioned the game to work WITHOUT a target image by using "Surface Detection" tools, but after a couple days of research and trial and error, I discovered that the Surface tracking is not precise enough.
The game required a very steady anchor point and unfortunately the tracking quality was very jittery, which made the user experience not fun.
Image tracking is a reliable way to do AR so I went with that, but not without issues as well.
Creating the right tracking image might be tricky as well because the image has to be high contrast with a lot of unique details that do not form a pattern.
After some trial and error I ended up with the tracking image you see below.
Besides that, another challenge was the UI.
I had to learn the hard way that making your UI part of the game's 3D space is a mistake, mainly because you cannot predict where the player is going stand and look from, so implementing a dynamic-scaling-rotating UI would be a great challenge.
Using a traditional HUD UI would be best from a development point of view and will benefit the user experience as well, although it is not groundbreaking or highly innovative.