RayTraceLib_1.8.9-0.0.1.jar is a beta file of the Minecraft mod Ray Trace Library, made for Minecraft 1.8.9. It was published on February 10, 2016 and is 0 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Ray Trace Library mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.