To be sure I understand you right, they never transform?
I used transform on all the Sims in my household. One is an alien. The alien transformed, the rest of the Sims did not. All Sims received the Moodlet for being transformed. I tried transform on NPC Sims. None of them transformed. I tried on several NPC aliens. The alien transformed.
It wasn't that the transformation reset after going to CAS?
I went into CAS to change the hairstyle and color of one of the Sims that I had transformed that was not an alien. After making the modifications, her skin color and hair color changed like she had been transformed. It was not what I had set.
I went back into CAS to alter the alien disguise. The Sim that looked like she had been transformed reverted back to normal skin tone and had the hair color I had selected. The alien was no longer appearing transformed. I was only changing the clothing of the alien Sim's disguise.
Could you test a non-alien Sim to see if it's all Sims or just aliens?
It seems in my game, transform only works on alien Sims in my save. The Sims do revert back when you enter CAS.
