# Bi-directional value linking, not Mimic **URL:** \ **Category:** Flame Questions\ **Tags:** expressions\ **Created:** [December 12, 2025, 10:17pm UTC](https://forum.logik.tv/t/bi-directional-value-linking-not-mimic/13888 "2025-12-12T22:17:52Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![ALan](https://avatars.discourse-cdn.com/v4/letter/a/a87d85/32.png) [@ALan](https://forum.logik.tv/u/ALan)\ **Post date:** [December 12, 2025, 10:17pm UTC](https://forum.logik.tv/t/bi-directional-value-linking-not-mimic/13888/1 "2025-12-12T22:17:52Z")
Is there a way to have a bi-directional link/expression between two different nodes, even a single channel, and not use Mimic link. For instance, lets say I have a Matchbox in the top level of Batch, but also the same Matchbox within an Action. I want a change in a particular field in either, to be reflected in each. So if I set value X=1 in node A, it changes in B. Or if I set value X=2 in B it is reflected in A. Mimic link won’t work between these nodes since they are essential in different logical spaces. No secondary python either. Must be automatic. ---
**Author:** ![philm](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/philm/32/9286_2.png) [@philm](https://forum.logik.tv/u/philm)\ **Post date:** [December 12, 2025, 10:21pm UTC](https://forum.logik.tv/t/bi-directional-value-linking-not-mimic/13888/2 "2025-12-12T22:21:34Z")
I’d expect the answer to be expressions since it is the only way to instantaneously telport values from one channel to another. ---
**Author:** ![Sinan](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/sinan/32/155_2.png) [@Sinan](https://forum.logik.tv/u/Sinan)\ **Post date:** [December 12, 2025, 10:23pm UTC](https://forum.logik.tv/t/bi-directional-value-linking-not-mimic/13888/3 "2025-12-12T22:23:10Z")
Unfortunately expressions work one way. I have wished for this every now and then. Should a feature request. ---
**Author:** ![philm](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/philm/32/9286_2.png) [@philm](https://forum.logik.tv/u/philm)\ **Post date:** [December 12, 2025, 10:29pm UTC](https://forum.logik.tv/t/bi-directional-value-linking-not-mimic/13888/4 "2025-12-12T22:29:30Z")
You’re restricting your approach to two channels. build the matchboxa s if you were building a HUD in any sensible piece of 3d software. build a controller, and have subordinate nodes accept the channel changes of the controller node. Context views means this is trivial. ---
**Author:** ![ALan](https://avatars.discourse-cdn.com/v4/letter/a/a87d85/32.png) [@ALan](https://forum.logik.tv/u/ALan)\ **Post date:** [December 12, 2025, 10:36pm UTC](https://forum.logik.tv/t/bi-directional-value-linking-not-mimic/13888/5 "2025-12-12T22:36:43Z")
not if I want to be able to control something at multiple levels. I suppose I could have multi-viewport up with top-level Batch up where the “controller” is, and then second view with whatever I’m working on. But I don’t work that way. ---
**Author:** ![philm](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/philm/32/9286_2.png) [@philm](https://forum.logik.tv/u/philm)\ **Post date:** [December 12, 2025, 10:40pm UTC](https://forum.logik.tv/t/bi-directional-value-linking-not-mimic/13888/6 "2025-12-12T22:40:14Z")
but you can i lament that we never got HUDs I always loved sliders in SoftImage and Lightwave ---
**Author:** ![ALan](https://avatars.discourse-cdn.com/v4/letter/a/a87d85/32.png) [@ALan](https://forum.logik.tv/u/ALan)\ **Post date:** [December 12, 2025, 11:50pm UTC](https://forum.logik.tv/t/bi-directional-value-linking-not-mimic/13888/7 "2025-12-12T23:50:51Z")
> [@Sinan](#): > > Unfortunately expressions work one way. I have wished for this every now and then. Should a feature request. agreed. > **[Autodesk Feedback Community](https://feedback.autodesk.com/enter/err/Session_Expired_Server_B/lr/0/?ref=%2Fproject%2Ffeedback%2Fview.html%3Fcap%3D5afe6c84-5cb3-447a-b36c-cbd7f0688f84%26uf%3Da44410e4-cf4b-4bcf-b994-f529f71d4015%26nextsteps%3D1%26nextstepsf%3D8fbadb72-c1b4-44ad-b55e-888e3fdc17e4%26nextstepsuf%3Da44410e4-cf4b-4bcf-b994-f529f71d4015)** ---
**Author:** ![philm](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.logik.tv/philm/32/9286_2.png) [@philm](https://forum.logik.tv/u/philm)\ **Post date:** [December 12, 2025, 11:57pm UTC](https://forum.logik.tv/t/bi-directional-value-linking-not-mimic/13888/8 "2025-12-12T23:57:44Z")
head up display with sliders please