We received this question on another channel, and wanted migrate the conversation here:
Is it possible in the prompt to selectively have the AI change materials for specific surfaces (based on material definitions)? In other words if I organize my model with materials mapping/layers can I target to selectively change a certain material? While leaving others intact? Color changes for a specific material?
At the moment, this is controlled with the creativity strength. The higher value allows more freedom to make these material changes. However, it is a global slider, so if other materials are not defined to the same degree they can change as well. You could lower this value and change the material base color in Revit.
We could make this more granular in the future, so that users can retain more of the image and only change a specific region of the render.