Customizable grass and flower patches

[muzikbike]

Could it be possible to make flower, mushroom and grass patches within the world customizable, potentially to the extent of ore veins? This also goes for the clusters of fire within the Nether, although these generate slightly differently.

[muzikbike]

For 1.13+ seagrass will also have to be considered, and it generates weirdly due to having to be underwater.

Also, dead bushes.

[muzikbike]

And in addition, pumpkin patches and jungle melon patches.

Do naturally generated grass, flowers, mushrooms, dead bushes, pumpkins and melons all use the same type of code for generation? Or are they different? If so, these different types of generation habit could be selected similarly to how we can select between periodic gaussian and normal ore generation. I know fire generates differently from them, and seagrass needs different code entirely due to water.

[muzikbike]

Closing for now as CWG for 1.17 and above should have this functionality upon release; main ticket for terrain feature customisation in 1.12.2 is now #119