Changing ascended synthetic portraits

[Velho e Bom Joe]

I've created a portrait, and I want to apply it on synthetic ascension. The thing is, I want it to apply only if the founder species uses a certain portrait. Otherwise, use the default synth portrait.

More specifically, I've created Robo-crabs portraits and I want to make it so that only Crabs become Robo-crabs

I've found the code responsible for the ascension, and tried the following ( The changes I've made are between the #):

*some stuff before*
create_species = {
           is_mod = yes
           name = this
           plural = this
           class = "ROBOT"         
           portrait = "robot3"
          # from = {
               if = {
                   limit = {                  
                           owner_species ={
                               species_portrait = art15
                           }                 
                   }
               portrait = "syn_art15"
               }
          # }
           traits = {
               trait = "trait_mechanical"
               trait = "trait_robotic_3"
           }
*more stuff later*

It didn't work, the game still used the default synth portrait.
I tried not using the from, and removing the owner_species scope, neither solved the problem.

I'm probably using the if wrong, I suppose.

for reference, and just to confirm that's not the portrait that is bugged, I did try replacing without using if, and it worked (well, not 100%, as only the pops used my portrait, while the leaders used the synth one, even though they were the same species. Still, that's a problem on the portrait and not on the event.).

Any help is appreciated, and hopefully sparks more synth portraits from the community