could be nested block layer issue ; if you assign material to the geometry should help

really nice image , could you post a Clay image of the scene

also model units mater , Meters and Feet is recommend ; when using Centimeters and inch's you will have Floating decimal issued and will corrupt geometry

strange I have no problem with Blender plug in
1 st launch server then launch Blander octane works fine and fast,

great gif

nice work

nice images ; share some specs on it - how long it took , why, blah blah
they have some nice details in it while also seeing some fireflies

that is soooooooooooooo much better than a fish tank

can I get mine in this color ?

how did you do the grass

this is texture problem is a real pain, for me it lock up the session and Rhino becomes unresponsive