Revert "Use some realist order of magnitude of light"

This reverts commit 2aa6676050c3142b634f2e6063fdfa76435befe5.
Revert "Fix a typo in tonemap.frag"

This reverts commit b8d5719a827507b2ff4e24d9b68142deb7ddfcad.
Revert "Use a less intrusive delta value"

This reverts commit d7e3976ef57afefe8a26c68c273f73bd29c3c835.
Revert "Enable tonemap."

This reverts commit a0e63dea46e5fae41c92b54fa08369ffa206b2d2.