What can cause these shadows?

[burli]

That's interesting. Burli, what happens if you just remove the set_lighting call altogether? I did that with fun_caves/master since it didn't seem to be necessary anyway, and (perhaps coincidentally) haven't seen any shadows afterward. set_lighting seems to be a waste of cpu time unless you're actually changing ground level.

Still no shadows after a short test. Have not much time. Will try a more detailed test later

[burli]

Ok, I played a while and made some other tests with the mod. Never saw any unwanted shadows.

I guess this will help future modders

[paramat]

Interesting.

> set_lighting seems to be a waste of cpu time unless you're actually changing ground level.

If you use the mapgen flag 'nolight' then you don't need 'set lighting 0, 0', otherwise it's essential to remove the previous light values calculated for the core mapgen terrain.
if a mod alters a world then lighting needs to be set to 0 in the volume before running 'calc_lighting' in that volume.

[duane]

Interesting.

If you use the mapgen flag 'nolight' then you don't need 'set lighting 0, 0', otherwise it's essential to remove the previous light values calculated for the core mapgen terrain.
if a mod alters a world then lighting needs to be set to 0 in the volume before running 'calc_lighting' in that volume.

In the cases I've been working with lately, I'm changing things underground, with the (mapgen) cave generation turned off, so I think the game is setting the lighting to zero anyway, since it spawns nothing but stone and ore.

[paramat]

Yeah. Just mese block glows so that's the only subtle glow that will linger.