Can I make sculk growth?

This is the second time I try to write this post. But I was trying to do something like the warden and the sculk blocks & biome. I put blocks, a biome, a boss etc. But I think it's missing something... I figured this thing was the sculk growth/veins that can be placed multiple ways, I tried to make a custom model for it (since MCreator doesn't has it built-in), but it didn't work because when I placed it on top, it looked like it was flying. And besides, I could place it on top of each other, but I couldn't place it on the same block like the original sculk growth. I just need to know if it's possible to do that in normal MCreator. Can someone help me on that?