combo blocks

Hello, I have a proposal: I would like there to be a way to combine the blocks in the same cubic meter. This means that I can put half of a block (example: birch wood) together with the other half of a block of another type (example: gray concrete) in the same block. This will help design and creativity by being able to put two different blocks in the same place, half one half another. The way in which they could be combined would be with a machine where one block and another are introduced and then the result is the combined block; When the combo block is broken, you drop the two initial but separate blocks (meaning the combo block drops 2 blocks). I hope you find my proposal interesting, thank you very much and greetings from Argentina! :)