FS#6061 - Towns: lowers land for no good reason in triangular fashion (better roads)

Attached to Project: OpenTTD
Opened by SirkoZ (SirkoZ) - Saturday, 12 July 2014, 21:58 GMT
Last edited by andythenorth (andythenorth) - Sunday, 03 September 2017, 07:10 GMT
Type Bug
Category Core
Status New
Assigned To No-one
Operating System All
Severity Low
Priority Normal
Reported Version 1.4.1
Due in Version Undecided
Due Date Undecided
Percent Complete 0%
Votes 0
Private No


For the longest time now, possibly after new town layouts were added to OpenTTD, towns will every so often lower land in a particular fashion - shape of a triangle when town layout is set to better roads.
I'm really late with reporting this but I guess I found it curious enough and also seldom to occur so I didn't report it earlier.
On a mostly flat terrain instead of just building roads in "better roads" manner, town goes and lowers more land and deeper than it needs to in order to get it to the surrounding height level.
I show this clearly on two attached screenshots.

9th Aug 1990 screenshot = Town lowers land.
18th Aug 1990 screenshot = I "repair the damage".

This "bug" is present in all OpenTTD versions to date (as all contain "better roads" town layout)...
This task depends upon

Comment by andythenorth (andythenorth) - Wednesday, 23 August 2017, 07:18 GMT
Thought I'd seen a commit fixing this, but couldn't find it. Probably imagined that.
Comment by SirkoZ (SirkoZ) - Thursday, 16 November 2017, 19:24 GMT
Well I've seen it happen in 1.7.1 a just yesterday and it was an even deeper hole (triangular) than in Oil&Gasoline savegame attached.