... change the recepy to something wrong (aka accident/rush/human error) and the inserters already filled it in?

Did you ever added a filter to a splitter but the items when through it already?

The ideea is simple, IF this tick box is on (if it's off it's what we have now, nothing changed), there ...

I think this "No item" virtual object should be selectable as a filter for splitters from the filter menu (as well as for other logistics options that may benefit from such a filter, for whatever reason):

09-25-2025, 18-43-05.png

It's a small thing, and it isn't necessary to have this ...

Special Splitter Shenanigans Survey
TL,DR; Which of the behaviors pictured below makes sense to you? How far down the rows do things make sense?

Some spec details
1. Running directly into a curved belt will fail with "curved belt in the way"
- Justification: in absence of failures, smart belt ...

TL;DR
Add the ability to connect splitters to the circuit network.

Why
Currently, splitters are powerful, but they’re “dumb” – While inserters and belts can be wired to the circuit network, splitters remain outside that system, which creates a limitation in advanced factory design.

If splitters ...

... but might be messier to find a good UI.) Alternatively, a new separate option.
Spoilage filter.png

Realistically though it would be a splitter option, like sorting out the bad apples as they pass some optical inspection equipment. Then you'd have to constantly keep the produce flowing to ...

... mod and they have giant nest that have millions of HP and that waste a lot ammo. Be able to ignore some target playing some mod with artillery turret would be a big plus. For normal play I guess... kill nest only and leave worms alive saving ammo ? Kill Splitter nest in priority cause :twisted:

... the smart belt to try and make the undergound at the max lengh, possibly removing the yellow belts in the process, but it should stop at the splitter and not jump over nor remove it. Continuing to drag should place a underground entrance right after the splitter and resume mentionned behavior ...

Imagine many more existing belts _before_ the splitter. do you attempt to underground over those too? (This also means not attempting to upgrade them)

Don't know the best answer, hence why I'm now asking

... for limited resources. I've also thought of using it to set high-priority inputs - eg. outputs of core mining from Space Exploration - but I use splitter priority for that task for now.

However, monitoring the status of these priorities in a large base is challenging, especially when leveraging the ...

Asking for feedback on dealing with splitters
Here's some cases with splitters, where it might be ambiguous if want to underground over them.

- In the first row, it's reasonable to want to underground over the first bit
- In the second row, from feedback reasonable to _not_ underground over the ...

... 0..5 for quality level (0=any)
* -1,0,1 for lt,eq,gt
* input and output priorities - 1=right,0=none,-1=left, for example

This introduces no new behaviour modes to the splitter, other than allowing it to be disabled. But it would enable dynamic item routing, ideal for sushi and quality builds.

Sorry but no. The old behavior was a bug in the implementation and is not going to be reintroduced just because people want it to be bugged.

In 1.1 we could saturate a blue belt with 3 inserters if 1 of them was targeting a perpendicular splitter:
https://web.archive.org/web/20250614091919/https://wiki.factorio.com/Inserters#Chest_to_splitter
https://www.reddit.com/r/factorio/comments/s5qehh/faster_chest_to_express_belt_insertion/

In 2 ...

... byQ8TsrIFJsV3cdlqJG8CLud4JjfLPNOBnTqhCtHXGdH816yJsfNZY5cPR2Y89oJ2xfwVPDadt4LNAnjxHM6XVxPWjLr/AwQYxTiOvQyCOfCJoRlKZJ6UWVnKIpVpViRd9wMHTmUU
07-11-2025, 17-08-10.png

If it could be done in a single Splitter that would save a few Entities - but do we really need yet another Toggle switch? :lol:

TL;DR
Add an "inclusive filter" option to splitters, so unfiltered items can go to both outputs, not just one.

What?
Currently, splitters can only send exclusively designated items to one output lane, as per the filter configuration. I propose an enhancement: a new "Inclusive Filter" toggle in ...

Reduce splitter manual filtering by copying entity input/output to splitters (swap with paste)
Configure output/input priority with arrow keys (left/right input, up/down output)
Swap between entity input/output to inserter filter with paste function

... a mod just to avoid this annoyance, but that really shouldn't be solution.

Just now, I thought I might just get used to this, but then found my splitter wasn't filtering after trying to set it twice -- apparently splitters filter for quality too! And are not set without double clicking the item ...

... But why? Lets output all firearm magazines. It would be about 2 mouse clicks to select the base item, then specify any quality (same way a splitter would). Trying to use a decider combinator to do the same thing requires about 48 mouse clicks to restrict the signal output to just the firearm ...

... of 4, and you can have a full Yellow Belt of 4-high stacks of Copper Plates coming out. Then later down the line you could feed them into a Splitter with two Stack Levelers on the output side and get two full Red Belts of 2-high stacks. Or you can reverse it, and have a fully stacked Green Belt ...

Also see Stacking option for filtered splitter.