HMD in addition to SlimeVR head causing skeleton model to go below floor plane #759

New Issue

MrUnknownDE · 2026-04-05T22:03:41+02:00

MrUnknownDE commented

2026-04-05 22:03:41 +02:00

Originally created by @ZRock35 on 5/25/2024

Bug using HMD in addition to SlimeVR head tracker at same time. The video shows first that the HMD and head tracker both assigned to the head, on startup - not good because the Slime trackers reset down under the floor plane.

Reassigning the HMD to Head clears up the issue, Slime come back to normal position, but then assigning Slime head back on to head location puts the trackers all way out of position. Obviously they are fighting it out, and Mocap Mode was not on at any point.

In addition, the Slime head tracker can cause the skeleton model to go below the floor plane in SteamVR while using HMD, even if it is turned off in the server, if you assign the tracker to "head". Upon unassigning it, and reassigning the SteamVR HMD, it breaks - the skeleton model goes halfway up, embeds in the floor at the hips. No resets work to bring it back up at that point, and requires restarting the SlimeVR server to purge the unconnected Slime head tracker to clear things up.

https://github.com/SlimeVR/SlimeVR-Server/assets/91239122/1f23ac49-a9c4-49e7-a116-6eba5afc52bf

*Originally created by @ZRock35 on 5/25/2024* Bug using HMD in addition to SlimeVR head tracker at same time. The video shows first that the HMD and head tracker both assigned to the head, on startup - not good because the Slime trackers reset down under the floor plane. Reassigning the HMD to Head clears up the issue, Slime come back to normal position, but then assigning Slime head back on to head location puts the trackers all way out of position. Obviously they are fighting it out, and Mocap Mode was not on at any point. In addition, the Slime head tracker can cause the skeleton model to go below the floor plane in SteamVR while using HMD, even if it is turned off in the server, if you assign the tracker to "head". Upon unassigning it, and reassigning the SteamVR HMD, it breaks - the skeleton model goes halfway up, embeds in the floor at the hips. No resets work to bring it back up at that point, and requires restarting the SlimeVR server to purge the unconnected Slime head tracker to clear things up. https://github.com/SlimeVR/SlimeVR-Server/assets/91239122/1f23ac49-a9c4-49e7-a116-6eba5afc52bf

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Reference: github/SlimeVR-Server#759