It doesn't make much difference if you use OpenGL as renderer for DOSBox. It might fix some games but others are still broken. Just try the game Alien Virus with DOSBox and use OpenGL as renderer. The game starts fine, FMV's still have the the 1/3 black screen and you can't play the game because the mouse is locked.
I've got the Turok 2 - Seeds of Evil CD version. It came bundled with my ASUS TNT graphics card a very long time a go.
Edit: I've found the problem with DOSBox. It isn't possible to use HQ filters any more. I changed it to Advance Upscaling with a factor of 3 and everything runs fine now with OpenGL as renderer.