Also, if you are using optifine and everything is just black, try to turn fast render off, whick is located under the performance tab. It helped me in 1.7.10 with Thaumcraft, where I got a black screen with certain effects
I've just had an idea for another mod. Make it 180 degrees fov, and then from a second monitor the other 180 from behind.That would allow to see everything without headcaches Though it probably would be impossible to implement since the game supports only one screen
I have used render360 for quite a while, and I can promise you the headaches do go away. Just don't use the mod for extended periods of time until you're accustom to it, otherwise headaches can occur when leaving the computer. My recommendation (that I didn't follow) is to start at about 180 degrees (whatever's comfortable), and increase it gradually over several days/weeks.