---
title: MTLReadWriteTextureTier.tierNone
framework: metal
role: symbol
role_heading: Case
path: metal/mtlreadwritetexturetier/tiernone
---

# MTLReadWriteTextureTier.tierNone

Indicates the system doesn’t support read-write textures.

## Declaration

```swift
case tierNone
```

## See Also

### Enumeration cases

- [MTLReadWriteTextureTier.tier1](metal/mtlreadwritetexturetier/tier1.md)
- [MTLReadWriteTextureTier.tier2](metal/mtlreadwritetexturetier/tier2.md)