I use the art of the Bootcamp of Collider Craftworks to make this 3D weapon using Maya to make the blockmesh, Zbrush to polish the Highres mesh, come back to Maya for the Lowres Mesh, then i use Substance Painter for the 3 textures of the clean version, bloody version and the bloodier version of the knife, when i was happy with the result i use Unity and some shaders to make the scene pop out for the photo of the Thumbnail that is inspired in the Screen menu of the Last of Us part 1.