I am creating an adventure map in 1.9 with an invisible maze. However, it is difficult to make it because I can't see the barrier blocks even when I hold a barrier block in creative. How do I make the barriers visible(only in creative)?
It's a particle
If you change the particles in settings to
All, it will shown barrier blocks when holding a barrier.
One thing you could do to make the barriers even more visible would be to create the maze with an unused block ie. dirt. Once finished, use
/fill <x> <y> <z> <dx> <dy> <dz> minecraft:barrier 0 replace minecraft:dirt to turn it all into barrier blocks.
If you turn particals to all the barrier icon will show up, on normal minecraft this is in esc ,options, video settings and if you use optifine it's esc options video settings animations.