VividEngine2
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
...You can support development of Vivid3D Via patreon - https://www.patreon.com/vivid3d
With the above, you can achieve both 2D and 3D games, with advanced rendering techniques with minimal fuss and set up required. All pixel shaders are already coded and a part of the engine. And of course, you can easily extend and add your own fx and features.