Hi,
Some users experienced problems for starting S2ENGINE HD 2018.1, specifically these problems are caused by TDR detection.
TDR detection is verified when the operating system (Windows) waits to much time for a response by the graphics card (OpenGL).
S2ENGINE HD 2018.1 actually performs an huge precomputation during initialization stage for accellerating the new atmospheric scattering system.
There is a real possibility that the TDR detection is caused by this.
To fix the problem we have removed the precomputation of atmospheric scattering and distributed its calculus over multiple frames after the init stage.
This should fix the problem.
We wait for your feedback :)