Grasshopper Preview shadows in render, v8

hello, in rhino 7 i was able to see shadows in previewed geometry generated in grasshopper if i used the custom preview node. It seems like this is not the case in rhino 8. Is there any way to get that functionality back? or am i missing something?

i have screenshots here i opened these same files in 7 and 8.
for rhino 8, i had to bake the geometry to get the shadows to show which is not ideal for making animations for example.

i also included the little test files, theres not much in them but there they are.




blank.3dm (35.2 KB)
shadowtest.gh (11.0 KB)