Attachments:
parametersheet02.jpg (208.0 KB)

Okay here's how do it!

Right click in an empty part of a shelf and choose ‘New Tool’


Then go to the script section and paste the script in (it's at the bottom of this post).


Press ‘Accept’ on that and you should have a new toolbar button!
Now, select a bunch of nodes and press that button and you should get a dropdown of all the nodes within your selection


Choose one type and in the shared parameters should appear in your ‘Parameters’ Pane, ready for multi editing fun times

#Get all nodes under the current selection
ChildSOPs = []
for node in hou.selectedNodes():
    for child in node.allSubChildren():
        ChildSOPs.append(child)
        
#Make a list of unique types
seen = set()
UniqueSOPs = []
UniqueSOPsSorted = []
for SOP in ChildSOPs:
    if SOP.type().name() not in seen:
        UniqueSOPs.append(str(SOP.type().name()))
        seen.add(SOP.type().name())

#Added this to allow Object Level nodes to be selected
SelectedNodes = []
for node in hou.selectedNodes():
    SelectedNodes.append(node)
    if node.type().name() not in seen:      
        UniqueSOPs.append(str(node.type().name()))
        seen.add(node.type().name())

#Clear the selection
hou.node('/obj').setSelected(False,  clear_all_selected=True)

#Choose the node type you want to edit
UniqueSOPsSorted = sorted(UniqueSOPs,key=str.lower)
input = hou.ui.selectFromList(UniqueSOPsSorted, message="Select Node Type!")
if (len(input) == 0):
    print "Cancelled"
else:      
    #Multi Select the nodes!
    for SOP in ChildSOPs:
        if (UniqueSOPsSorted[input[0]] == SOP.type().name()):
            SOP.setSelected(True,False)
    for OBJ in SelectedNodes:
        if (UniqueSOPsSorted[input[0]] == OBJ.type().name()):
            OBJ.setSelected(True,False)

Attachments:
Screen Shot 2020-07-02 at 4.20.16 pm.png (58.8 KB)
Screen Shot 2020-07-02 at 4.22.42 pm.png (89.5 KB)
Screen Shot 2020-07-02 at 4.56.11 pm.png (33.8 KB)

Yeah that's the whole point of it. I did notice however that it was behaving a little unpredictably with Nulls.
I think it has to do with the parameters of the control nodes referencing the top level parameters of the null node. If I delete the reference it seems to multi edit fine.


But yeah, this has definitely saved me whenever I have to multi edit a bunch of nodes. Travelling into them one by one drives you nuts! Here's a little test, if I select this bunch of nodes and run it, then choose ‘Control’.


You can see in the parameter pane there are a bunch of nodes selected.


Oh, I realised I should have cleared the selection, I added a line to the script in the last post.
See how ya go!

Attachments:
Screen Shot 2020-07-04 at 2.21.22 pm.png (77.8 KB)
Screen Shot 2020-07-04 at 2.20.40 pm.png (95.8 KB)
Screen Shot 2020-07-04 at 2.56.11 pm.png (34.8 KB)

Attachments:
borat.jpg (22.1 KB)