[Feature]: Expand multi-image editing to 3 inputs

[alerikaisattera]

Feature description

Multi-image editing is currently limited to 2 inputs, even though all multi-editing models can admit more. The main reason for this restriction was the degradation of quality and consistency with 3 inputs, but Flux 2 models, even the 4B, work with 3 inputs just fine

Version Platform Description

No response

[CalamitousFelicitousness]

I've been drafting a supplementary system based on how Control works, with discreet "Units" where images can be placed.
Especially with support for Google gemini-3-pro-image-preview which supports even more than that there is utility there.

It could even add a toggle for ControlNet in the Unit, so the Unit can be Enabled/Disabled, and used as simple image input or control input.

[CalamitousFelicitousness]

Quick proof of concept

[alerikaisattera]

Another use for 3 inputs is QIE 2511 with ICEdit LoRA, which requires 3 image to operate