DS was also not great with textures but now at 18 months he copes with most things. Have you tried giving him one solid thing with his meal? For example a piece of brocolli which has been steamed with his usual meal. Ask him to pick it up one day and mash it in his fingers, maybe ask him to kiss it the next day and give it a lick the next day and finally take a bite. When he does one of these things make a huge deal out of it so he gets heaps of attention from everyone. DS isn't the best eater at the moment so we do this to try and get him to eat different things. He seems to thrive on the attention. Also ds loved those baby mum mum things that you find in the supermarket. Its a solid rusk type thing but it disolves in the mouth.