Maybe alt-mode was the wrong technical term, I meant the recipe icons in map view. They make such a huge difference when trying to visually find stuff, so I don't really want to disable those.

Unfortunately they cost performance in map view even if zoomed in and I don't see a single one of those ...

I did some testing, and you are right, disabling all map view options did help. Unfortunately it's difficult to live without ALT-mode in map view, and that option was responsible for the largest part of the extra update time.

Really sad that I have to pay that performance cost even when zoomed in ...

I have a very large base (100x science multiplier) where every bit of performance matters. Nowadays I mostly work from map view, but going into map view (looking at the same location with the same zoom) causes ~1.7ms of update time continuously, which is already 10% of the available budget. Since I ...

I have a very large base (100x science multiplier) using vanilla trains using parameters (2.7k trains, 2.9k stations).
Vanilla trains go to a loading station (all named the same), then go to an unloading station based on its cargo content using the item parameter.

Everything runs fine (just enough ...

TL;DR
Why is it so complex to feed products back into the machine?

What?
I'd like machines to pull from their output inventory (and maybe also trash inventory) when consuming ingredients. Inserters responsible for input/output can easily be wired to the machine itself for controlled input ...

TL;DR
Make it easier and for mods to define wind turbines.

What?
LuaSurface currently has a few wind properties, but they only affect smoke/clouds.

Please make it possible to:

bind an electric-energy-interface to the surface's wind speed or a user-defined per-surface runtime variable. I don ...

+1

Mods that want to do that will find a way and it will cost more performance that such an event (and might have restrictions with mod compatibility). For example using rocket silos or on-tick events with products_finished and/or crafting_progress .

This can be very restrictive, such that is has ...

TL;DR
Render a part of the map on top of the map somewhere else.

What?
Factorissimo 3 does something like this on mouse-over
12-10-2025, 17-46-12.png

However, there are some restrictions:

has problems with sizing (I had it matching previously, might be a bug in the mod, but shows how ...

TL;DR
More freedom on global or per-surface effects to not need hidden beacons that often.

What?
What we currently have:

LuaSurface::global_effect
some TechnologyModifier, such as lab-productivity, lab-speed, mining-productivity, recipe-productivity


These offer some possibilities ...

TL;DR
Technology A needs
- B
- C
- D or E or F

What?
Allow the tech tree to be more flexible. Some kind of OR in the tech tree dependencies would go a long way.

Every prerequisite is either a single technology or a list of alternative technologies (having 1 suffices).
Natural extension would ...

TL;DR
A new way to describe recipes:

2 iron plates OR 2 copper plates OR 1 steel plate
+ 5 wood
+ 100 water OR 50 petroleum
--->
2 medium power poles

What?
Every ingredient to a recipe is actually a list of alternative items/fluids.
I haven't thought this through to the very end, but it will ...

Trying to paste the top row onto a straight line of belts going the same direction. Preview suggests that another underground belt is added (middle row), but after execution it isn't (bottom row). I don't think that the extra underground belt is a good thing (see https://forums.factorio.com/129883 ...

When trying to paste the top row onto a straight line of belt (middle row) going to the same direction, it adds additional underground belts that are absolutely not wanted (bottom row).

07-15-2025, 17-25-19.png

This is just a repro case, what I actually tried to copy&paste made a bit more sense ...

Rseding91 wrote: Sun Jun 22, 2025 7:28 pm Ok, I added it for the next release.

Thanks for adding neighbour_connectable. Unfortunately I still don't have access to fluid usage of fusion reactors, see my last post. Bug or feature request?

Thanks for the report however this is working as intended. The arms consume power when they start moving towards a chunk and don't constantly draw power while in operation. This is done on purpose to avoid constantly needing to touch the energy source memory and the performance of doing that as it ...

06-21-2025, 13-46-05.png

This is the energy consumption of a single asteroid collector. Looks to me as if the arm's energy is only consumed for a single tick, even though it is moving all the time.

Expected behavior: If there is enough power, the arm should consume the max power for the whole ...

I was testing some asteroid collector setups and was surprised to see that the collected chunks are completely missing from the production side of the statistics. I'd really expect this to be in line with mining drills and agricultural towers, where the generated resources appears in the production ...

Please take a look at TriggerEffectItem .

It is lacking all the extra fields that exist depending on the type, which are well documented for prototype stage. I don't know whether it's worth duplicating all that information, but it means that working with these in runtime stage currently doesn't ...

Fluid usage is here: https://lua-api.factorio.com/latest/classes/LuaEntityPrototype.html#get_fluid_usage_per_tick

Neighbor connectable I didn't include - what's the point in having it?


Fluid usage works for fusion generator (even though the documentation doesn't say so) but always returns nil ...

There is LuaItemPrototype::module_effects , but it is very difficult to properly calculate the effects of a module with given quality due to integer math and rounding going on. This problem got more serious with the addition of QualityPrototype::default_modifier . It's very difficult to reproduce ...