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VRChat Upgrade to Unity 2017.4

If you're a VRChat Creator, you're probably familiar with the fact that VRChat currently runs on Unity five.6.3p1. This has been the case since August of 2017, when we upgraded from Unity 5.3. Nosotros would like to denote that VRChat is planning to upgrade to Unity 2017.4.15f1 LTS for an upcoming release inside the next couple of weeks. Nosotros have a special Open Beta bachelor to all users that can be used to test the new version, as well every bit upload content.

A common question we're expecting is "Why not Unity 2018?" We're primarily focused on moving to Unity LTS (Long-Term Back up) versions rather than every incremental Unity version. This allows us to ensure that we'll receive support from Unity in the long-term and that time to come upgrades go more smoothly. In one case 2022 has an LTS version released, we can start looking into moving forward with that upgrade.

We chose Unity 2017.iv LTS considering it gets u.s.a. a lot of fixes, tools, and improvements that have come up along with the last yr of Unity development. Information technology too allows u.s.a. to easily upgrade to further Unity LTS versions once they become available. Finally, Unity's LTS branches ensure that nosotros accept back up and compatibility for quite some fourth dimension thanks to the extended support cycle.

As stated above, the upgrade carries with it all of the improvements, fixes, and changes that Unity 2022 included. In that location's a lot to see! Here'southward some of the more interesting bits:

• Fixes for Audio/Video sync on Unity Video components (and therefore VRC_SyncVideoPlayer)
• Support for Unity Store Avails that crave 2017.4
• Much easier version upgrade workflow when the next Unity LTS releases

If yous're interested in checking out some of the more detailed additions, nosotros've whipped up this document for y'all.

Upgrading Content

Technically speaking, Unity upgrades often alter the mode that the shader and rendering pipeline piece of work, which break shaders on content. When we performed our five.3 to 5.half-dozen upgrade, our customs was significantly smaller and asking users to re-upload all of their content was not as scary of an ask.

VRChat'southward Community is now much larger, and asking users to re-upload all of their content is simply not feasible. With some very gracious assistance from Unity, we take managed to avoid this issue and move forward with VRChat. Unity provided united states of america with a patch was released in 2017.four.15f1 LTS that allows u.s. to use the shaders included with the AssetBundles yous're uploading to VRChat.

Getting Ahead of the Bend

Fifty-fifty with a careful upgrade procedure and working with the Unity team, upgrading a big corporeality of user-generated content is no small feat. At that place are some things to be aware of that volition affect most Community content. The good news is that for these items, a uncomplicated re-upload using Unity 2017.4 will fix your issues.

You will want to re-upload your content using 2017.4.15f1 LTS during the Open Beta if:

• You lot accept mirrors in your world. If you have a mirror in your earth in 5.6, the mirror volition non display properly in 2017.4. The residue of the earth volition be fine, but the mirror volition exist cleaved.
• Yous take baked lighting and you still have the Broiled Lights enabled in the scene. Those lights will be ready to Mixed when viewed in the 2017.4 client, resulting in the scene having both Baked and Realtime lighting, significantly reducing performance. Re-uploading the world in 2017.4 will prepare this result.
• You lot utilize Real-time GI (Global Illumination) in your world. If yous use a five.half dozen earth in the 2017.four customer, your Realtime GI will not piece of work until you reupload for 2017.4.
• You use animations in your earth or on your avatar that touch on rotations of objects. The rotations will not piece of work properly in 2017.iv and accept unexpected/incorrect values. Reuploading the world/avatar will fix this problem.
• Your world or avatar uses Crunch Compression in texture import settings. Textures will appear as black or invisible if they are compressed with v.half-dozen'southward Crunch until y'all reupload using 2017.4'southward Crunch Compression. As much as Crisis may help with texture file size, it is typically not compatible between major Unity versions. It will probable break any time nosotros upgrade.

Avatars are a special case right at present. If yous upload a 2017.iv avatar to an already-existing v.six Blueprint ID, it will overwrite that five.vi avatar. Delight upload 2017.4 avatars to a new ID, or else you will not be able to load the avatar in Live (5.half dozen) VRChat! We are working on a set for this event.

Updating worlds does not have the problem noted above with avatars. We retain your earth AssetBundles past version, and we want you to keep your world's stats, like popularity. We encourage y'all to utilise the same Pattern ID when uploading a 2017.4 update for your world.

Although this covers a large subset of content on VRChat, it is much less severe than the full-spectrum content wipe that occurred between 5.iii and five.vi.

Additionally, we're enlightened of some problems with the 2017.four.15f1 LTS version of VRChat that we're working on:

• You cannot switch your microphone from your default recording device when you launch VRChat. Workaround: Set your default recording/communication device in Windows earlier you launch VRChat. You can configure SteamVR to do this automatically if you're using a VR headset.
• Every bit stated previously, if y'all upload an avatar on 2017.4 to an existing five.6 Pattern ID, information technology will overwrite the 5.6 avatar. Apply new avatar Pattern IDs when uploading 2017.4 avatars past clicking "Disassemble" on your Pipeline Manager before uploading.

How do I become into the Open up Beta?

You tin bring together the VRChat 2017.4 Open Beta past joining our Discord, finding the #open up-beta-2017-info channel, and following the instructions there.

How do I install Unity 2017.four.15f1?

Unity Hub is a bully tool that allows you to seamless install and work with multiple Unity versions at once. It will make swapping between 5.half-dozen and 2022 projects very unproblematic. We strongly recommend using it!

Check out our full guide on installing Unity 2017.4.15f1 here, which likewise includes a guide to drift from 5.half dozen to 2017.4 fairly painlessly without losing your content.

Some Final Tips

Create copies of your projects before y'all import them. Importing a project into a newer version of Unity volition make it very difficult/incommunicable to port it dorsum to v.6. Keep backups! We cannot help you with reverting your projects.

Do non overwrite your avatar Pattern IDs. As nosotros stated above, nosotros're working on fixing this, merely for now, create new IDs for your avatars. Do this by clicking "Detach" in the Pipeline Manager on your avatar. If yous accidentally write over an avatar, become back to Unity 5.half-dozen and reupload from your five.six projection.

Testing, Upgrading, and Helping Out

Cheers for helping united states test VRChat in Unity 2017. We can't wait to become this version out to yous. Delight run information technology through its paces, upgrade your content, and examination things out. If you run into problems, post an issue up on our VRChat 2022 Upgrade Canny lath. Feel free to postal service an upshot fifty-fifty if you lot believe information technology is a duplicate or minor.

Upgrades are a necessary step to keep VRChat moving forward, and we have worked hard to lessen the impact to our users. Nosotros understand if you accept questions or concerns, so please let u.s.a. know via our Canny or our Twitter. We have channels gear up on our Discord for discussion regarding the 2022 upgrade. Please share this Blog post every bit much as possible to those you lot recollect should know about it — the more users that see it, the easier our upgrade process will be.

In one case again, thank you lot, and we'll meet yous in the Open Beta.

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Source: https://medium.com/vrchat/vrchat-upgrade-to-unity-2017-4-90727844522a

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