Search Issue Tracker

By Design



Found in


Issue ID




Resources.UnloadUnusedAssets unloads textures that are only referenced by MaterialPropertyBlocks

Graphics - General


When using a MaterialPropertyBlock to set a texture for a material, if the texture not referenced somewhere else, it gets unloaded when calling Resources.UnloadUnusedAssets.

Steps to reproduce:
1. Open the scene MaterialPropertyBlock.unity
2. Enter Play Mode
3. Note that the texture on the cube is loaded at runtime
4. Press Space to call Resources.UnloadUnusedAssets

Result: Note that the cube turns to black.

Note: Removing the [PerRendererData] attribute from the _MainTex property of the ShaderTest shader shows how after unloading unused assets the texture used by the material becomes null.

Reproduced with: 2017.2.0b2, 2017.1.0f2, 5.6.2p2, 5.5.4p1.

  1. Resolution Note:

    ShaderPropertySheet is volatile data/unserialized data and therefore can't be tracked easily. The workaround is to either keep a dummy material reference in the scene or reuploading the texture to GPU upon calling UnloadUnusedAssets.

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.