Jetpack Fighter was a mobile game that I worked on at Hi-Rez Studios years back.
I worked on the 3D model and textures of environment props and also art dressing the environments in the game to fit various themes introduced in the game. Our initial release of the game included 3 zones and hundreds of maps that were possible with the modular sets that were created.
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I worked with amazing artists who were able to make these environments possible:
Sky Flygare:
https://www.artstation.com/skylebones
Peter Guo:
https://twitter.com/goicaue?lang=en