Impostors
Impostors are cross-platform variations of an avatar that are generated and optimized for performance. When other users can't see your avatar, they'll see the impostor instead of a Fallback, provided that an impostor is generated, and you have enabled the "Use Impostor as Fallback" setting in your Settings. Keep in mind that only 10 new impostors can be generated per day.
Impostor generation currently only support humanoid avatars. Generic avatars will be supported in the future.
Generating
The first step to creating an impostor is to create and upload an avatar.
Once you've uploaded an avatar, generating an impostor for it is easy:
Log in to the VRChat website.
- Navigate to the info page for the avatar you'd like to generate an impostor for. You can do this by pressing "Avatars", then "My Avatars", then the name and icon of the one you want.
- Click "Generate Impostors", or, if the avatar already has an impostor that you'd like to be updated, "Regenerate Impostors", and wait for a few minutes while it generates.
- Refresh the page, after some time, you should now see that your avatar has impostors for Quest and PC.
Previewing
Once you've got your impostor generated, and you've logged into VRChat, open the Avatar menu, and click the avatar that you generated an impostor for. The "Features" of the avatar now includes "Impostor" among the rest. You should also see a new button underneath the avatar model preview, which will allow you to switch between viewing the impostor and the normal avatar for a quick preview.
Impostors that are previewed in the menu may exhibit more artifacts than they would when viewed on another user.
Visibility
Currently, there are only three ways to see an impostor.
- Avatar Preview (e.g. viewing the impostor on the avatar's details page)
- Performance Blocking (e.g. the avatar's performance rank is "Very Poor" but your minimum displayed performance rank is set to "Medium"). The user wearing the performance blocked avatar must have the setting "Use Impostor as Fallback" option enabled.
- Platform Mismatch (e.g. the avatar is uploaded for PC, but you're on Android or vice versa). The user wearing the incompatible avatar must have the setting "Use Impostor as Fallback" option enabled.
VRCImpostorSettings component
Impostors come out pretty good by default. However, complex avatars may benefit from some customization.
To customize your impostor, add the "VRCImpostorSettings" component to your avatar before uploading it. Changing the settings of this component allows you to change the impostor's appearance. You can add multiple "VRCImpostorSettings" to customize different body parts.
Resolution Scale
Changes the amount of space on the impostor's texture atlas that is dedicated to this body part's texture. For instance, you can place this script on the head bone and change this value to make the head take up more or less of the texture atlas, increasing or decreasing the overall texture quality. Note that this may shrink other parts of the body on the atlas if needed.
This is relative to the bone that VRCImpostorSettings is placed on.
Transforms To Ignore
Ignores these transforms when capturing data for the impostor. This will hide them from the final result.
This is independent of the bone that VRCImpostorSettings is placed on.
Extra Child Transforms
This is good for things like wings and tails, it will tell the Impostorizer to make a separate sprite for the bone this script is on.
As an example of what not to do - you could put one of these on each finger to turn them into independent sprites. However, since all sprites share a single texture sheet, filling it with things like fingers will cause quality to decrease elsewhere - it's a balancing act.
This is independent of the bone that VRCImpostorSettings is placed on.
Re-parent Here
Re-parents another bone to this impostor sprite. This means that it will be impostorized with this body part, and be a part of that sprite.
For instance, if you'd like your wings to be a part of the upper body, you can re-parent the root wing bone to the chest bone during impostorization with this.
This is relative to the bone that VRCImpostorSettings is placed on.
See also
Official resources
Impostors on VRChat Creation documentation
