it appears that the base height + extrusion worked for the first level...is the second level just a base height or is it a base height + extrusion? it appears that either the second level has been set to high and no extrusion has been done. Can you provide more info on the steps you used?
Yes it appears to work well for the first level. I’ve created scene layers for each year level e.g. 2001, 2006, 2013 etc. I then used each layer by creating an extrusion to the population wanted, and the base height for each layer as the previous extrusion used. E.g for 2006 I used the 2006 population for the extrusion and the 2001 population for the base height.
Can’t understand why it would give me the correct top level but not fill in the stack to be solid!?