If you're looking to create some nice renders of real-time assets for your portfolio, Unity and Unreal are overkill. Marmoset Toolbag is generally the go-to for game artists. If you browse ArtStation, you'll see that a lot of people render their game art in Toolbag. I work for Marmoset though, so I may be a little biased.…
Cycles materials are compatible with the new viewport real time engine Eevee. Eevee will be a free Marmoset Toolbag directly available in your 3D software so there will be no need to use anything else, it will only be counter productive. This is rendered from viewport of Blender: https://youtu.be/nxrwx7nmS5A Tutorial:…