Yes , I got a pretty fast reply , although the documentation also suggests mesh lights to be in closer groups spacially.
I already have a solution but it's not practical, I can render each section seperately and deep comp after. The other thing that's bugging me is how to control trace sets in a smarter way , can it be driven by detail attributes for example, because I have 50 instanced proxies, so practically I have one object, what if I want to trace based on an ID, for example trace against each other in this group of instances that has a matching attribute value.
I keep experimenting, finding better values and all that. I am still stuck at baking Irridiance point cloud into the proxy for example. How do I make Houdini load a specific Irridiance point cloud per instance of proxy etc.
And yes, I am doing my last tutorial with redshift that's why I got it, although I will have to do a simple mantra switch along with it.