[2.1.17] Hidden Technology becomes visible once it is triggered

[hgschmie]

Consider this technology prototype:

Code: Select all

{
  type = "technology",
  name = "secret-gate",
  hidden = true,
  research_trigger = {
    type = "build-entity",
    entity = "roboport"
  }
}

This works fine and the technology is not visible in the tech tree (so I can have other technology depend on it which in turn becomes researchable when this gets unlocked).

However, if I place a roboport, I get a "secret-gate researched" alert on the screen and afterwards it is visible in the tech tree.

I would have expected that "hidden" means hidden (i.e. does not fire alerts and does not become visible in the tech tree).

[Rseding91]

Thanks for the report however I'm not able to reproduce any such issue. When the technology is researched and the GUI is opened with the 'research finished' button it shows the research that was finished. Outside of that; the technology even if researched while hidden does not show in the GUI.

[hgschmie]

- Place the attached "Warehousing_1.1.1.zip" in your mods folder.
- Load the attached "hidden test" map. This should contain only the base game, the Warehousing mod and EditorExtensions

- Open the tech tree and look for Warehousing. There should be the base Warehousing researched and two logistics tiers unresearched
- Create a roboport and place it.

You will get the "Technology researched" chime and this:

Screenshot 2026-09-14 at 13.17.12.png (28.63 KiB) Viewed 364 times

with this technology definition:

Code: Select all

{
    type = "technology",
    name = "warehouse-logistics-research-gate",
    icon = ICONPATH.."warehouse-logistics-research-1.png",
    icon_size = 256,
    hidden = true,
    research_trigger =
    {
        type = "build-entity",
        entity = "roboport"
    }
}

the research gate is not visible in the technology tree but the chime (and the console message) give away that it exists.

[Rseding91]

Thanks for the reproduction steps. This is now fixed for the next release.