Help with mining game

[empty dagger]

I need help with a mining system. I want the mining area to break only where you click I don't want it to break block by block but in a satisfying way where it is like your are actually mining. Something like the mining system in the video.

[viral oxide]

You cant do that effect just with blocks, as you how in your left image, you need to use roblox terrain, but if you want to use blocks ( which is more complicated ) , you can create a similar method minecraft used, but insted of breacking one, it breaks multiple, in a range where the player hit, and for perfomance same method just culling the blocks and faces, so server handles all information about blocks positions, and client replicate them.