New Release 8.5 Patch (8.5.9) and samples (8.5.10) are available!

November 6, 2019 - 1:46pm #1


Today we’re launching a patch to the Vuforia Engine 8.5 Unity Extension (8.5.9) to include a fix for a linker error seen in Xcode when building Vuforia Engine iOS apps with Unity 2019.3 beta 8 and later. The new version will be made available via Unity’s package manager.

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Vuforia package conflict

April 14, 2021 - 9:07pm #1

Hi, I used MRTK 2.6.1 with Vuforia 9.8.1 to built a project.

Before I import this project to HoloLens2, everything seems fine.

When I install appx to HoloLens2, it showed me the error:

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Model target didn't appear on Hololens

April 12, 2021 - 7:07am #2

I made a model target database by Model Target Generator, and test it in Model Target Test App. It works well.

But when I imported it to my unity demo,and run it on Hololens2 , nothing appeard when I focus on the Object.

My Unity version is 2019.4.4 ,Windows SDK 10.0.19041.0, I have Imported the Vuforia plugin: "Vuforia Hololens 1+2 Sample for Unity 2019.4 LTS",and replaced the mode target database in "2-ModelTargets" scene. And I also  have tried create a model target in an empty scene. none of them worked.

Does anybody know what to do about it

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Script errors on both unity holo examples

April 11, 2021 - 9:47am #3

Hey All, 


Total newb here.  I am trying to build to hololens with the Unity Vuforia Hololens examples.  I have tried both the 2019 and 2020 versions.  When I build to Holo I can see the scene but it does'nt seem to read the image targets from the original scene file.  When I look at the image target scene and click on the Vuforia assets there seems to be an issue with loading the scripts.  I ran both, but this current example is using Unity 2019.4.23, UWP selected in build settings, applied the MRTK settings. Running Vuforia  I am sure its an easy fix 


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Problem with coordinate system

April 6, 2021 - 12:05pm #1

Hi, i want to calculate distance betwenn two qrcode. But unity uses a left-handed coordinate system while the Windows Perception APIs use right-handed coordinate systems.

So when i rotate my qr code on a general axes Z. The distance becomes wrong on X and Y varie. 

Microsoft give us that

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Vuforia Image Target for mobile object

March 23, 2021 - 7:46am #2


I am currently creating an application for which I track a mobile (moving) object with the help of Vuforia Image Target and, by deactivating the extended tracking function, have a (self-created) hologram overlay the object and move along with it. But I must never lose sight of the image target or the hologram will disappear again.

But now I am looking for a way to do this differently. Is it possible to track the object only once and then mirror the movement of the object without looking at the image target again?

Unity Version: 2019.4.22

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Activation Error on HoloLens Deploying

March 4, 2021 - 1:14am #2

Hi everybody,

I'm working on a project using vurforia image target in unity. Everything was working fine. I can still run it in unity without any problems. But if i try to deploy it to the hololens via visual studio it gives the error msg "Windows Store app could not be activated. The acitvation request failed with the error: system can't find the file".

Even if i try running some builds wich worked fine yesterday this error appears!!

Hope someone can help!


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Hololens2 MRTK Vuforia fails to init on device

January 17, 2021 - 8:50am #1



So I have an MRTK 2.5.3 and Unity 2019.4.13f1  project running Vuforia 9.6.4 and utilizing "Image Targets" if that matters. In the unity play the project works fine

however once made into an Appx and put onto the Hololens2 it gives these errors from the in game terminal:

So the initialization completely fails. I have tried googling very hard but I cannot find any good results.

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Hololens 1 difficult Model Target

January 14, 2021 - 3:46am #2


We are making an AR app for training first-aid givers with the 1st gen Hololens, and as such we have a need to track the resuscitation doll as a model target. the doll (picture attached) however is a pretty difficult model target to track for a few reasons -

- head and limbs are deformable.

- "skin" is shiny and lacking in features.

- client wants the dummy to be mounted on a Stretcher at the end of the scenerio (adaptive target), therefor - further deformation is likely.

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Modify Vuforia Sample

January 10, 2021 - 5:15pm #3

I am trying to modify the Vumark scene in Vuforia sample for use in my own project. I would like to remove some things in the scene but can't seem to figure out the correct references in code.

These are the things I am trying to remove:

1. image of the Vumark instance that appears on top of the physical vumark

2. The box showing the info about detected vumark instance. See screenshot

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