Forge 1.8 doen't work for me so I use vanilla shaders with optifine if thats what you mean ShadowMancer. Forge is not bad also if it works for you. I never heard of anyone crashing and losing all there data with forge but I still Keep a back up of all my worlds.
To run shaders you must have alteast a NVIDIA or AMD GPU.
You Can Run This jar file and you won't need forge:
http://www.mediafire.com/download/p33h7 ... 9mc1.8.jarNext To Make It Run With More FPS you can have Optifine (YOU MUST RUN THIS ON THE SAME PROFILE AS THE ONE YOU DOWNLOADED SHADERS ON):
http://optifine.net/adloadx?f=OptiFine_ ... D_U_D5.jar