FOSS gamedev and creative worlds

Tinkering with my little Raspberry Pi Minetest server (installed last month) and Carbone - also installed from last month. My younger nephew is having a blast, and admittedly I'm having fun too building stuff when I should be working on exams or other projects. :)

Just recently started using world edit to clear out large swaths of blocks and noticed that when I started making a tunnel near the surface, a large "burnmark"-like stain or shadow appears on the surface blocks above where the tunnel happens to be. Below are some screen shots, illustrating the problem.

So here is the tunnel at 'ground level'...


And here are some aerial shots of the burn mark above where the tunnel is located...



Any ideas for investigation?

What happens when you manually alter some of the nodes? Maybe a lighting update problem.

If by manual, you mean going in and digging out some of the tunnel 'by hand', that seems to work just fine - no shadow artifacts appear on the surface overhead.

Standing near, or even inside the affected area, looks like this:

digitalmouse wrote:Standing near, or even inside the affected area, looks like this: […]

An what happens if you mine some nodes manually while standing in there?

fly into the shadow and pay attention to the item in your hand. When the shadow hits your hand and darkens it, fly up until it gets lightened. Use this method to find the corners of this invisible thing that causes the shadow. Set that area to air with world edit. It will clear it. The area you set needs to be just below and above, and just beyond the corners of this zone. It may take a few tries to get it all.

Sorry for the crude explanation... I'm trying to rush :)

i've also this stranges shadows... When i dig a node in this shadow, nohing happens, the shadow still here

tried placing a torch or planting a tree in the shadow? Anything that forces a lighting update.

Or, select the area where this bug is, and use the command //replace air air

I have found that LevelDB reduces the shadow problem with WorldEdit considerably, so I'd recommend migrating your world. Quickly flying around the shadow area just after using WE also helps.

Creating a big dirt block in the air above a shadow (make sure it's big enough vertically so the top of the dirt block has no shadows), then replacing it with air often removes shadows on the ground.

I've recently made a very simple mod which fixes light and flow problems.
Just type "/mapfix" and it corrects most of light and liquid flow errors in a radius of 40 blocks. If you want another radius, type /mapfix <your_radius> (if you haven't the "server" privilege you can't exceed 50).

Download on Github

Excellent, Gael, your mod works very well!

I will put it in Github.

I tried the 'place a torch' method into the really darkened areas, and it seems to work:



But "less burned" areas only light up in the torches' radius of effect:


So it looks like other methods mentioned here should be given a try. I'll report back on what worked for me later on - kinda swamped with exam stuffs at the moment.

Thanks for all your help thus far!

Place a torch doesn't work for me, and do nothing... I will try the Gael-de-Sailly method soon :)

Thank you, Gael de Sailly. This worked perfectly for me.










And by the way, I have never used a map editor on this map. The bottom right spot annoyed me enough that I fixed this, and appeared last. The other on the hill is old but didn't bother me. I gave my brother my map files, and without having many of the mods installed, he reported that he could see some "unknown objects" in the air close to the ground at those positions, and also the one above the water that I never noticed before.

My mod works but is badly coded. I'll improve it this afternoon.

Especially the vm:calculate_lighting() is useless in this context. I just discovered that the light calculation is done by vm:update_map().

I fixed the problem by remivingbonebofbthe darkbair nodes with worldedit.
You have to go inside the shadow and tipp this: