Invisible or black blocks
The blocks are there — you can walk into them. It is lighting or chunk rendering, not the build.
How to tell it apart from missing blocks
Walk into the gap. If something solid stops you, the block exists and is simply not being drawn — that is this article. If you walk straight through, the block is genuinely gone and you want the article on missing blocks instead.
Why it happens
- Lighting was never calculated for the area. A pasted build arrives with no light data, and until the game recomputes it, interiors render pitch black.
- The chunk was drawn before the paste finished. The renderer is showing you a stale copy.
- The build genuinely uses barrier or light blocks, which are invisible on purpose.
- A resource pack is loaded that does not have textures for those blocks.
What to do
- 1Press F3+A. That forces every loaded chunk to redraw and fixes it most of the time, instantly and with no side effects.
- 2Walk far enough away that the chunks unload, then come back. This forces a full reload rather than a redraw.
- 3On a server, run /reload or restart it — some lighting is only recalculated on load.
- 4Turn off any resource pack and look again. If the blocks appear, the pack is the problem, not the map.
Large pasted builds can take a while to light properly on a busy server. Give it a minute before assuming something is broken.