crowds in solaris/karma

 Bring in crowd from obj using SOP Crowd Import node (here it's still packed agents). Create Instanced SkelRoots is preferred I think

Stylesheets don't work with Karma/Solaris (as far as I know!) To target props/shapes in a crowd you're best off using Collections. Here we're making collections of the hammer prop. 

It's important to tick Allow Instance Proxies in Collection!

The syntax is %reference:/path
In the example it's %reference:/crowd/agentdefinitions/ball/shapelibrary/l_hammer

Here's the stage scene outliner thing

Assign the materials to the collection by typing in the name. Eg. %hammer

Be sure to expand the Material Binding and tick Include Descendant Primitives in Collection
You might have to change the Strength to Stronger or Weaker than Descendants too.

I couldn't see a good way to access point attributes (eg. per agent float/int values) but Material X does read them - so I guess use switch RGB and stuff like that?

This seems to be the user data equivalent-

This seems to be the best switch RGB equivalent-

Just plug em in like this - just like Arnold

And ta da...attributes and collections targeting different bits of a crowd!

multi layers and props agents more info!

Bit of new info I learnt from this handy video https://www.youtube.com/watch?v=CVMu-6sRqvY
I was finding I couldn't layer my props previously. So I'd only be able to have a "hat" or a "sword" agent, but couldn't seem to combine them, despite their bindings being separate. The answer *seems* to be this.... bind all possible shapes! here's how we do it.

1 - use agent animation unpack to get a bind pose. I then timeshift it to frame 1 (you might use 1001) to remove time dependency

2- get all your geo and transform them to where you need them. Eg. sword at left hand, hat at the head positions

3- mergepack them all, and give them appropriate names

4- capturepacked geo, specifying each named packed prim + joint to capture to

5 - now in the agent layer you can specify multiple props/shapes and group them up.

 - note you no longer have to specify the joint in this node, as the props have bindings already

-remember to assign to default

agent layer props

Instead of using that script to transfer from object to world space, it can be easier to do this. Position them against one of your clips and then specify them in the layer sop - in my case I used the default T pose clip, which in all honesty will probably your best option.
It seems like you will have to do a separate agent layer sop per joint/transform that you are adding to, eg- one for the head, one for the wrist etc.