LumenRT-Cancel the shadow of the model

I'm sorry to bring the problem up again,but it really affects our project.

This is my previous post:https://communities.bentley.com/products/microstation/microstation_visualization/f/visualization-forum-1977638070/211907/lumenrt-enable-disable-light-shadows

I tried a few things:Change the model material type to water,I find that shadows disappear.or When I turn down the star level,the quality of the shadow will decrease but it will not disappear.(Just to be clear:When I output the video, showing stars doesn't work)

Although the real light and shadow effect is a big advantage of LumenRT,I don't want it in some special cases(When I focus on the model itself, the shadow is a distraction).

I think the program can be easily implemented to remove the shadow.Could you consider adding this function, because it is very critical for us.