No, in the current version there is no such feature.
For this need to use vector tiles.
We have already done a lot of work in this direction, but it is very far from the release.
Most likely this feature will be in Online Maps v3.1.

I am working with a custom map style from https://snazzymaps.com/

But I want something more complex. Is there any way to change the plain color areas to texture areas? For example, to convert the green area to grass area texture.

Thanks!!