Well technically all colors are texture/structure based

My wife said all her friends were doing it and was going to try it until she had to pay... After some quick googling I learned they're just using stable diffusion. here is a link to a decent video that helped me quickly set up a training session and create the same pictures as Lensa, with better control, free, and someone else doesn't learn what you look like lol. Also it uses Google colab which is online and works if you don't have a high end graphics card. You can then download the resulting trained file and run it as much as you want.