I did not know this option !! thanks.
there is !! renderer exchange function. under the render tab in render global.
I exchange it to "lightwave renderer" and F9 work again.
quite stupid reason for me. ah..
but I remain this post possibly for some one encounter this trouble.
I'm afraid that kray is subjected to lightwave's orientation ( what is doing , newtek ? ) as I found.. only version up within same intager number( 9.x )mess up kray's node support capability. I think if kray would be stand alone . internally possese assets like node texture, fur or so. (my personal ...
for example , built-in "bvh loader" in v 9.6 is different from that of v 9.3 in v 9.3 bvh created by "pvs"(kind of motion capture system I have ) is loaded exactly. but in v 9.6 same bvh is loaded with the torso twisted !! as if broken figure. well, I can load it ...
I'm testing kray and vRoom v1.2 lightwave v 9.31 and default setting on kray
kray v1.7 it works well (a bit slow.. but completed ) kray v2.1 it does not work ( can't recognize at all , the result is same as screen shot I've cliped on this post)