Stefan Ullinger Hi, so here we go: GL_LINE_SMOOTH bad for business! ;) I checked the code within SDL_renderer_gl.c / GL_CreateRenderer(..) and have found the reason for blurred lines when using OpenGL. I have attached 2 images here. I don't know whether this has to be changed and I don't know if there is an option to turn it off/on...just wanted to say that with GL_LINE_SMOOTH enabled there is a difference when rendering with opengl compared to directx.

/* Include the SDL main definition header */
#include "SDL_main.h"

#ifdef main
#undef main
int
main(int argc, char *argv[])
{
    return (SDL_main(argc, argv));
}
#else
/* Nothing to do on this platform */
int
SDL_main_stub_symbol()
{
    return 0;
}
#endif

/* vi: set ts=4 sw=4 expandtab: */