Inferred Image Descriptions
The easiest way to get started with Image Generation is to simply let the system use the text of each response to decide what to illustrate this turn. This doesn't require you to do any specific setup in the Definition, it will simply look at the Character response and generate something based on that.
Depending on your context, this may lead to Characters generating inconsistent images or images that don't align to you particular Character or story. It's hard to predict what it might use in the returned response. We encourage creators to use the Image Style attribute to establish some consistent themes in this case.