Why chiseled glass breaks my greenhouse?

[MrShake]

Guys i have a weird problem. I want to make a nice detailed roof to my greenhouse. The problem is whenever i add my chiseled blocks to it it stops being a room and therefore a greenhouse. What shoul i do?

[Professor Dragon]

That's expected.

https://wiki.vintagestory.at/Room

Faces of chiseled blocks only need to be "almost solid", meaning that no more than 32 voxels are missing from that face in total, to count as solid. The block will be considered solid if at least 50% of the total volume of the block filled in with voxels and the inward or outward face is considered solid. As of 1.20.11, using a wrench to rotate a chiseled block does not update its insulation, but using a chisel does.[1]

To get around this, you either need to meet the chiselling conditions above, OR install a mod which changes partial blocks to meeting solid block room requirements, such as:

This is just an example - there may be better mods for your purpose out there:
https://mods.vintagestory.at/cbr

There is another approach to consider, which is to ignore it altogether and say "Hang it." I made myself a fancy "greenhouse", but it was a greenhouse in the generic sense, rather than in the Vintage Story "Room" definition sense. I accepted the trade-off between having a massive decorated space, and meeting the room requirement. But this was an aesthetic choice - I already had functional greenhouses elsewhere for crops.

Professor Dragon.

EDIT

If you want some inspiration of what is possible either late game or in creative, check out this thin walled greenhouse. You do need to be on top of using chiselling tools, and probably a chiselling mod also.

"A lot of people ask me a question about the last video about a greenhouse, whether it is a functional greenhouse. The answer is yes. If you do everything right, the greenhouse should receive a bonus of +5 degrees Celsius. The chiseled roof and walls are within limits. Fruit trees do not take away the bonus. I posted the screenshots in a separate post."
 

Or by the same person:

End edit.

Edited September 17, 2025 by Professor Dragon