With the Light Level Overlay Reloaded Mod, v1.1.1 (MC 1.9-1.11) installed in Minecraft 1.10.2, the Java VM hosting Minecraft crashes to the desktop when I step through a portal into the Nether. Only removing the mod lets me enter the nether.

The crash was such that nothing was generated in the ".../.minecraft/crash-reports" folder. However, there is an "hs_err_..." file with some crash info. I've included that and the Shaders and FML Client logs in the attached Zip file.

logs.zip

Note: the mod works fine when I'm in the Overworld. It lets me see the light level on the surface of every block, helping me to properly light my base and the surrounding territory.

After some manual testing, I think this should the inter-mods compatibility issue, which is very hard to locate. Well, I will make some changes on the Light Level rendering methods in next release, hopes it could fix this issue.