SlimeVR is an inertial mocap solution that has just opened on CrowdSupply. The tech is similar to mocap systems like Perception Neuron and PrioVR, but with some very interesting differences.
There are 2 kinds of tracker: standard tracker (battery powered, wifi, IMU) and extension (just IMU). The extensions are smaller trackers that connect with a short cable to the stardard trackers, to provide enhanced accuracy (so you get 2 IMUs on one body part)
Pricing (different tiers on CrowdSupply):
Free US shipping, $15 international.
The campaign is already up to $167,805 of $180,000 goal on the first day. Estimated shipping is March 2022.
I have no connection to them, only found out they exist about 2 hours ago, but apparently one of my co-workers helped them on some code or something which is how I heard about it. It does look pretty cool, and so much cheaper than buying a Perception Neuron or Vive trackers if you just want VR Chat.
Reviews of the beta units:
The main concern is these are purely inertial tracking and don't use magnetometers. So position tracking is based on the skeleton hierarchy and your headset position. But most importantly, they can have yaw drift (like the DK1 or the Go and it's controller). But it seems easy to reset on the fly (could probably set up an autooculustouch script to do it on a button combo). I've used a $1500 Perception Neuron mocap suit and it has the same issue (with far more annoying calibration poses each time). So not as precise as Vive trackers, but far better than a Kinect or other cheap solution.
But I've been burned on mocap crowd funding before (waiting 7 years now for the PrioVR suit I paid for!). As I said, I have no connection to them and only found them today. However I like the open source side, they give instructions for how to make your own trackers using NodeMCUs (I have a few beside me now) and IMUs (I have a heap) and the low tiers are pretty cheap for a crowd funding gamble.
One final interesting thing: you technically don't even need to buy it. They have software for mobile phones to act as the trackers. If you have a heap of phones lying around you can tape them to your body and download the free server software and test it out now. 🙂
Two days left on the campaign. There's already over 2000 backers.