blocks sides not rendering

Are you using any mods? Perhaps MCPatcher?

Looks like you are using OptiFine. Please report that to the mod author and not to the Vanilla Minecraft bug tracker.

They aren't using Optifine. Optifine adds more Video Settings.

Thank you for your report.
However, your ticket has been resolved as a duplicate.

This issue has been linked to the original bugreport: MC-3998. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.

i am using no mods or optifine

on the second picture I agree but on the first it is only some blocks so it can't be that.