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.

TL;DR
You should be able to set the filter on a splitter to only split off items of certain stack heights

What?
Splitters allow us to filter off certain items from a belt, and Space Age added the ability to split of all items of a certain quality.
It would be really nice to do the same with stack ...

TL;DR
Add filtering option to inserters/splitters to only grab/change lane of items with specific freshness level conditions fulfilled.


What?
Splitters/inserters get the filter option "freshness threshold", which works similar to the decider combinator: a constant (or even more potent, a circuit ...

In the splitter interface add a toggle that sends the contents of the right-hand input belt only to the left output belt and vice versa. This will enable much simpler and more compact balancers. Given how powerful splitters already are I don't think this capability is unreasonable.

... 2 images say way more than 2000 words
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The best suggestion i have is to make the underground's color brighter, than the normal belt's color but not as bright as the splitter's color, wich i also think makes more sense.

Having splitters able to stack does lower the barrier to entry to start using stacking - I could see people using them initially to consolidate the output of existing smelter blocks into fewer belts to squeeze more down their main bus footprint without a complete re-tooling of the entire production ...

A single filtered splitter could take 2 unstacked single-item belts in and through stacking output all the items from both input belts onto the filtered output (and the output belt would still only be half-full with full stacking research). Two of these, with a third unfiltered splitter to merge the ...

TL;DR
Where a splitter has a filter applied, provide an option to tell the filtered side of the output to stack items up to the current level of belt stacking research.

What?
Add a "Stack Filtered Output" option to splitters that is linked to the Filter option. The "Stack Filtered Output" option ...

Muche wrote: Sat Jan 18, 2025 10:59 pm Snip

Yep, which then makes it impossible to reliably copy-paste splitter settings.

What happens if you blueprint a splitter with priority to left/A, and place it rotated 90/180/270 degrees? Should the splitter's settings or GUI's labels change?


No matter how a splitter is rotated the labels are always the same. That's the clue.


Splitter-PortStarboard.png
Labels don't ...