Are tech tree changes additive?

[A9p]

Hey y'all,

I've been reading through threads and mod descriptions (oh so many gorgeous mods) this week since I picked up the game, but I haven't been able to find an answer to this question - do tech tree changes add to each other or replace each other.

For example, if I have two mods (mod A and mod and both add items to (for example) survivability, will I see the added items for both mods in survivability in the R&D centre, or will one override the other?

(I'm only asking about additions to the stock tree here, rather than moving stock parts around or changing node names, etc).

[A9p]

In the end I went and experimented - and provided they just add things rather than altering stock, they are definitely additive .

I am not quite sure how this works for altering stock or for things that add new nodes like Interstellar though.

[malkuth]

Those nodes are actually stock. They were added by devs for future mods could use them.

Only issue would be if mod rearranged them.