[MC-2826] distant wall changes from dark->lit->dark as I move forward to it Created: 11/Nov/12  Updated: 06/Mar/13  Resolved: 03/Mar/13

Status: Resolved
Project: Minecraft: Java Edition
Component/s: None
Affects Version/s: Minecraft 1.4.4
Fix Version/s: None

Type: Bug
Reporter: Alexandre Duret-Lutz Assignee: Unassigned
Resolution: Duplicate Votes: 0
Labels: lighting
Environment:

Linux, Java 1.7.0_09 (HotSpot 64-Bit Server VM)


Attachments: PNG File 2012-11-11_23.16.16.png     PNG File 2012-11-11_23.16.29.png     PNG File 2012-11-11_23.16.39.png     PNG File 2012-11-11_23.16.49.png     PNG File 2012-11-11_23.17.00.png     PNG File 2012-11-11_23.17.11.png     PNG File 2012-11-11_23.17.30.png     PNG File 2012-11-11_23.17.43.png     PNG File 2012-11-11_23.17.50.png     PNG File 2012-11-11_23.17.57.png     PNG File 2012-11-11_23.18.07.png     PNG File 2012-11-11_23.18.15.png     PNG File 2012-11-11_23.18.22.png     PNG File 2012-11-11_23.18.30.png     PNG File 2012-11-11_23.18.34.png     PNG File 2012-11-11_23.18.38.png     PNG File 2012-11-11_23.18.44.png     PNG File 2012-11-11_23.18.48.png     PNG File 2012-11-11_23.18.57.png     PNG File 2012-11-11_23.19.07.png     PNG File 2012-11-11_23.19.13.png     PNG File 2012-11-11_23.19.31.png    
Issue Links:
Duplicate
duplicates MC-603 Lighting changes with elevation Closed
Confirmation Status: Unconfirmed
Game Mode: Survival

 Description   

This is a lighting issue I have observed in 1.3.2, 1.4.2, and 1.4.4.

I'm in a large room at y=9, and the center cursor is pointing at a wall at z=450.

The attached set of 21 pictures show me walking in straight line towards this wall, moving from z=406.5 to z=426.5 by unit increments.

At z=406.5 (first pic) you cannot see the opposite wall.
At z=416.5 (2012-11-11_23.18.15.png) you can see it clearly.
And at 426.5 (last pic) you cannot see it anymore.

Because of this, moving in this room is very weird. There are some positions where you can see the entire room clearly (it's 50-block long), but when you move towards one of its extremities it progressively fades into the dark before becoming visible again...



 Comments   
Comment by Markku [ 03/Mar/13 ]

Very nice descriptive screenshot series. Apparently not everyone "gets it", though.

George: You misunderstood the effect; it is not only the area around the sunlight that becomes less dark, but when you move to that small area, the visibility range towards everything becomes better.

Nevertheless, that is the "Minecraft physics" of void fog; see the linked issue MC-603 for more.

Comment by George Gates [ 03/Mar/13 ]

The underground is dark, and if you allow sunlight in it, that small area gets less dark.

Works for me.

Comment by Alexandre Duret-Lutz [ 12/Nov/12 ]

Yes, I have one block at (80,9,416) which is under direct sunlight (or moonlight). The middle position in my sequence, in which the full room is visible, is just 5 blocks away from that block.

So I guess I can't really call this a bug, since it is documented. It is still a bit counter-intuitive though.

Comment by Kumasasa [ 12/Nov/12 ]

Good catch, that's it !
At the screenshots the skylight ("sl") increases and has it's maximum near the ladder to the right, then decreases again to 0.

Comment by Tails [ 12/Nov/12 ]

Actually some of your screenshots show, you have indeed direct sunlight in this room. "Opening up an area to the sky removes void fog in a small area around the opening." (Quote from minecraft wiki: http://www.minecraftwiki.net/wiki/Void_Fog#Void_fog)

Comment by Anon Ymus [ 12/Nov/12 ]

I think this may be a problem with void fog rendering.

Comment by Alexandre Duret-Lutz [ 11/Nov/12 ]

I tested with the default texture pack and got the same behavior. I have no mod installed.

Comment by Kumasasa [ 11/Nov/12 ]

Can you please retest with default texture pack and without mods ?

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