Enclosure decorations have a sheet on the spreadsheet, so go there for individual detail.
Generally: like many MFZ features, enclosure decorations are as serious as you make them. You can choose to use them purely aesthetically, to make your enclosures prettier - or you can use them to rack up points. We'll talk a little bit about that second thing.
- Diamond decos will give bigger bonuses than ZD decos. (Of course.)
- There are three killer 50% bonus decos: Large pond (grass), rock arch (rock), frozen waterfall (ice)
- You'll only get bonuses for up to ten of the same decos per enclosure.
- Bonuses are doubled if the enclosure enrichment item is present. If you have a couple aspens in an enclosure, get a watering trough in there too.
Here's a post from Upjers from shortly after they launched enclosure decos: