Why I can't change the z position refrence in the layer builder in FDTD?

Hello,

I’m trying to build up a layer structure by the layer builder in FDTD. However, I found that the z position referemce is fixed at the bottum of the layer structure and I can’t make any change to it. I remenber it can be changed in the past, so I don’t know what is happending now. I would appreciate if anyone can help.

Thank you!

Hello @dc5rc,

For clarity, the different options for defining the z location of the layer builder were removed when the option to define the start position of each layer (relative to the z position of the bottom of the layer) was added. Do you require a different method of defining the z coordinate?