0006390: Trans-cavern passages sometimes have an incomplete ramp (blocked by a floor tile), making travel through it impossible. - Dwarf Fortress Bug Tracker

ID	Project	Category	View Status	Date Submitted	Last Update

0006390	Dwarf Fortress	World Generation -- General	public	2013-11-18 11:26	2017-04-02 15:21

Reporter	smjjames	Assigned To	Loci
Priority	normal	Severity	minor	Reproducibility	always
Status	acknowledged	Resolution	open
Platform	Laptop PC	OS	Windows 7 32x
Product Version	0.34.11

Summary	0006390: Trans-cavern passages sometimes have an incomplete ramp (blocked by a floor tile), making travel through it impossible.
Description	While spelunking using a modded creature and sometimes using DFhacks reveal to assist in finding the passages, I've noticed that while the passages themselves are complete, they often have a spot where there is an up ramp, but there is no corresponding downramp above it, just a floor blocking the way up, or down depending on direction of travel. It seems to happen more often at the floor of the upper cavern level but I've had ones that are blocked off at other points. The announcement triggers as normal. The passages are common enough that you'll eventually find one that you can go through. I've also had these a few times on an embark site.
Steps To Reproduce	Take an adventurer into the caverns and explore around, investigate every downward passage until you find one that you can't go all the way through or get an announcement of a downward passageway with no actual access. Although if you use DFhacks reveal (or the dev tool equivalent that Toady has, if any), you can just walk around on the surface and look using that. These are the cavern worldgen params I use, but the parameters shouldn't matter. [CAVERN_LAYER_COUNT:3] [CAVERN_LAYER_OPENNESS_MIN:50] [CAVERN_LAYER_OPENNESS_MAX:100] [CAVERN_LAYER_PASSAGE_DENSITY_MIN:0] [CAVERN_LAYER_PASSAGE_DENSITY_MAX:0] [CAVERN_LAYER_WATER_MIN:30] [CAVERN_LAYER_WATER_MAX:100] [HAVE_BOTTOM_LAYER_1:1] [HAVE_BOTTOM_LAYER_2:1] [LEVELS_ABOVE_GROUND:50] [LEVELS_ABOVE_LAYER_1:20] [LEVELS_ABOVE_LAYER_2:1] [LEVELS_ABOVE_LAYER_3:1] [LEVELS_ABOVE_LAYER_4:1] [LEVELS_ABOVE_LAYER_5:2] [LEVELS_AT_BOTTOM:1]
Additional Information	This http://www.bay12games.com/dwarves/mantisbt/view.php?id=4520 might be related in some way in that it's also a problem with ramps and worldgen.
Tags	cavern, caverns, ramp, ramps, worldgen

smjjames 2013-11-19 10:30 reporter ~0024216	Also, just to add a bit of a note, since Toady was working on the underground sites and may have changed worldgen related things, it's entirely possible that it got fixed along the way in the next version. Little bit surprised that there wasn't a bug report on this already, but at least there are ones which are passable all the way through.

Ziusudra 2017-03-30 06:38 reporter ~0036389	Reproduced in 0.43.05 - http://i.imgur.com/HzpPw7z.png

Date Modified	Username	Field	Change
2013-11-18 11:26	smjjames	New Issue
2013-11-18 11:28	smjjames	Tag Attached: cavern
2013-11-18 11:28	smjjames	Tag Attached: caverns
2013-11-18 11:28	smjjames	Tag Attached: ramp
2013-11-18 11:28	smjjames	Tag Attached: ramps
2013-11-18 11:28	smjjames	Tag Attached: worldgen
2013-11-19 10:30	smjjames	Note Added: 0024216
2013-11-29 14:56	~~user6~~	Relationship added	related to 0004520
2017-03-30 06:38	Ziusudra	Note Added: 0036389
2017-04-02 15:20	Loci	Assigned To	=> Loci
2017-04-02 15:20	Loci	Status	new => acknowledged
2017-04-02 15:21	Loci	Summary	Trans-cavern passages sometimes have an incomplete ramp, making travel through it impossible. => Trans-cavern passages sometimes have an incomplete ramp (blocked by a floor tile), making travel through it impossible.