As someone who works in the games industry - what is shown at E3 usually doesn't even exist in the game yet, and is usually directed by hand, unless the release of the game is like a month away(in which case, the game was already sent to submission some time before). In some cases whole features only exist as a design draft, but are still in the E3 demo because that's what we want to achieve in the end. So showing "procedural content" that was assembled by hand is not really dishonest if that's what you want your procedural code to generate after you are done with the game. It's a bit like showing a new model of a car, but cars shown at car shows are almost always assembled by hand, because the factories are not set up to build them yet - which means that once the actual assembly process kicks in, the final product might look different than what you saw at a car show. Doesn't change the fact that the model shown at a car show is what the manufacturer wants to achieve.