Structure Gel API 1.16.5

Structure Gel API Mod 1.18.1/1.17.1/1.16.5 helps developers, who utilize the jigsaw system, make structures with ease. The code it brings is already documented.

The purpose of this API and Library mod for Minecraft is to bring a unique block which is called Structure Gel Block. It is basically a nice tool that is used for filling the inner parts of structures. It also acts in the same way as the structure voids. Hence, you will find it easy to pass through it even though you can still see it.

For the spreading mechanic, you can activate it if you put gel as you sneak. Here are their spreading mechanics:

Red Gel: Its spreading mechanic is the default. It disperses across the cardinal directions.
Green Gel: The way it spreads is similar to red gel. However, it also spreads in a diagonal way.
Blue Gel: It has the same function as the red gel too. But, it will not disperse into areas where you see the sky.
Cyan Gel: The way it acts is a mixture of both green and blue gel.
Orange Gel: It has the same behavior as the red gel.
Yellow Gel: Its spreading mechanic is across the plane.

To eliminate gels, you just put gunpowder on them. Structure Gel API requires Minecraft Forge as well.