Problem with panels
I have a problem when using panels in my test chamber.
Place a trigger_once with "On Trigger, Panel, Set Animation", a func_brush parent with panel, but at the time of making the animation, the panels back to the bindpose instead of keeping the animation.
How I can fix it?
(Sorry once again for my bad English. If needed, I can record a video with the problem)
Did you place an logic auto: OnMapSpawn, *name of the panel*, SetParentAttachmentMaintainOffset, pannel_attach?
That keeps the panel brushes on the same distance to the center of the panel-thing from the arm.
Hope that helped 
There should be a keyvalue on the panel prop saying 'Hold Animation?' - set this to yes.
Both checked and the problem continues
Also make sure the attachment point is panel_attach. For some panels (like Circle Shield), it isn't. You can find out by opening the model in the model viewer, going to the Attachments tab, and taking a look. But for the standard 64x64 and 64x64 rusty, panel_attach is fine. (At least, I think that's what it's called...taking Ipfreaky's word for it because I'm not in front of Hammer right now. )
Yes, the attachment point is correct.
Check that you have nothing in the default animation field for the panel. If you do, the panel will revert to this when finishing an animation.
I think in terms of boolean variables. Generally, it makes things easier.
The field is empty.
Are you ABSOLUTLEY sure that "HoldAnimation" in the prop_dynamic's properties is set to "Yes"?
If it is and this still continues, it might be because the animation you are using goes both in AND out. Try using a different similar animation.
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Yes, "Hold animation" is set yo yes. Others animations give me the same problem.