Tested with OpenSpades 0.1.2 and latest master in Windows 10.

I still get 300+ fps even when r_vsync is set.

Relevant piece of code:

"No OpenGL context has been made current" is returned by SDL_GetError() when I used the following code to debug this problem:

if (SDL_GL_SetSwapInterval(r_vsync) != 0) {
    SPRaise(SDL_GetError());
}

Perhaps SDL_GL_SetSwapInterval has to be called at a later time?

As a workaround, I'm using cl_fps to limit the FPS to the same as my screen refresh rate.