0007585: Trees channel light underground - Dwarf Fortress Bug Tracker

(0027964)
Ijiero (reporter)
2014-07-30 10:15

I can confirm this bug. I just registered to report it myself.

Additionaly: upon removal of the tree, your underground lair will have an open ceiling where the tree used to be. I assume this is as intended...

(0027965)
Talvieno (reporter)
2014-07-30 10:20

I wouldn't think that's intended, no. I suppose it makes sense in a way, but I don't think it's intended.

(0028071)
Drazinononda (reporter)
2014-07-31 22:23

As far as realism goes, it makes sense... if you dig out a room that has a tree for a ceiling, then remove the tree, you've removed the ceiling.

From a game mechanics standpoint, I assume that tree trunks work off the same base code as constructed walls, so that they block movement but leave full empty tiles (rather than a floor) when cut down. Otherwise trimming the branches off a tree would leave branch-shaped floors in the upper reaches, which wouldn't make sense.

(0028091)
Talvieno (reporter)
2014-08-01 11:41

That part makes sense. The weird part is that trees act like glass would in real life, and channel light downwards through them - or at least pass light downwards. The light remains there permanently.

(0028092)
Peeps (reporter)
2014-08-01 11:51

Maybe there were holes between the roots that let light filter down or something.
As for the light staying after the hole was filled, DF has always been like that; try channeling out an area on the surface then covering it with a floor.

(0028254)
lethosor (manager)
2014-08-03 19:37

Fairly easy to reproduce in 0.40.06 with 0006749 fixed.

(0029223)
slink (reporter)
2014-08-18 09:37

In 0.40.09, if you cut down the tree first then the roots vanish and there is no problem with light coming down when you dig where the roots used to be. I don't know yet what happens if a new tree grows over a room. Perhaps they don't grow there.

Issue History
Date Modified	Username	Field	Change
2014-07-23 06:04	Talvieno	New Issue
2014-07-29 08:20	Knight Otu	Relationship added	has duplicate 0007712
2014-07-30 10:15	Ijiero	Note Added: 0027964
2014-07-30 10:20	Talvieno	Note Added: 0027965
2014-07-30 13:32	Ijiero	Issue Monitored: Ijiero
2014-07-30 13:33	Ijiero	Issue End Monitor: Ijiero
2014-07-31 22:23	Drazinononda	Note Added: 0028071
2014-08-01 11:41	Talvieno	Note Added: 0028091
2014-08-01 11:51	Peeps	Note Added: 0028092
2014-08-03 19:36	lethosor	Assigned To	=> lethosor
2014-08-03 19:36	lethosor	Status	new => acknowledged
2014-08-03 19:36	lethosor	Tag Attached: 0.40.06
2014-08-03 19:37	lethosor	Note Added: 0028254
2014-08-06 10:34	Footkerchief	Relationship added	related to 0007068
2014-08-18 09:37	slink	Note Added: 0029223
2014-08-24 15:05	Knight Otu	Relationship added	has duplicate 0008143
2014-08-29 08:26	Footkerchief	Status	acknowledged => confirmed
2014-09-12 09:25	Footkerchief	Relationship added	related to 0000087
2014-09-12 11:42	Toady One	Status	confirmed => resolved
2014-09-12 11:42	Toady One	Fixed in Version	=> Next Version
2014-09-12 11:42	Toady One	Resolution	open => fixed
2014-09-12 11:42	Toady One	Assigned To	lethosor => Toady One

Notes
(0027964) Ijiero (reporter) 2014-07-30 10:15	I can confirm this bug. I just registered to report it myself. Additionaly: upon removal of the tree, your underground lair will have an open ceiling where the tree used to be. I assume this is as intended...

(0027965) Talvieno (reporter) 2014-07-30 10:20	I wouldn't think that's intended, no. I suppose it makes sense in a way, but I don't think it's intended.

(0028071) Drazinononda (reporter) 2014-07-31 22:23	As far as realism goes, it makes sense... if you dig out a room that has a tree for a ceiling, then remove the tree, you've removed the ceiling. From a game mechanics standpoint, I assume that tree trunks work off the same base code as constructed walls, so that they block movement but leave full empty tiles (rather than a floor) when cut down. Otherwise trimming the branches off a tree would leave branch-shaped floors in the upper reaches, which wouldn't make sense.

(0028091) Talvieno (reporter) 2014-08-01 11:41	That part makes sense. The weird part is that trees act like glass would in real life, and channel light downwards through them - or at least pass light downwards. The light remains there permanently.

(0028092) Peeps (reporter) 2014-08-01 11:51	Maybe there were holes between the roots that let light filter down or something. As for the light staying after the hole was filled, DF has always been like that; try channeling out an area on the surface then covering it with a floor.

(0028254) lethosor (manager) 2014-08-03 19:37	Fairly easy to reproduce in 0.40.06 with 0006749 fixed.

(0029223) slink (reporter) 2014-08-18 09:37	In 0.40.09, if you cut down the tree first then the roots vanish and there is no problem with light coming down when you dig where the roots used to be. I don't know yet what happens if a new tree grows over a room. Perhaps they don't grow there.