The "Full" smooth lighting feature was implemented to fix the lighting of certain blocks like the back of stairs in Minecraft, but the feature is now useless because the implementation of models have fixed the lighting issues the "Minimum" setting would otherwise still have.
It seems like "Full" and "Minimum" don't even differ anymore. The attached double screenshots show "Full" and "Minimum" setting.
Screenshot below taken with Smooth lighting set to the Minimum setting.
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been delivered.