### MDL Material Override Example

Source: https://docs.omniverse.nvidia.com/simready/latest/simready-asset-creation/material-best-practices.html

This snippet illustrates how material settings like Albedo Map and Color Tint can be overridden in a USD file, taking precedence over the original MDL settings. Understanding this 'over' workflow is crucial for managing material consistency.

```usda
def Material "MyMaterial" (
    outputs = {
        "surface": "/World/Looks/MyMaterial.mdl"
    }
)
{
    float "inputs:diffuse_albedo" = 0.90, 0.11, 0.11
    color3f "inputs:base_color" = (0.90, 0.11, 0.11)
    customData = {}
}
```

--------------------------------

### Python BaseRuleChecker for SimReady Validation

Source: https://docs.omniverse.nvidia.com/simready/latest/simready-faq.html

This snippet demonstrates the use of a Python BaseRuleChecker for validating SimReady assets. It inspects USD prims, attributes, and APIs to ensure compliance with defined rules.

```python
from simready.validation import BaseRuleChecker

class CollisionRule(BaseRuleChecker):
    """Example rule: every rigid shape must carry a CollisionAPI."""
    def __init__(self):
        super().__init__("RB.COL.001", "every rigid shape must carry a CollisionAPI")

    def check(self, prim):
        # Implementation to check for CollisionAPI on the prim
        pass

class UpAxisRule(BaseRuleChecker):
    """Example rule: upAxis shall be Z."""
    def __init__(self):
        super().__init__("UN.006", "upAxis shall be Z")

    def check(self, prim):
        # Implementation to check the upAxis attribute
        pass

class MeshNormalsRule(BaseRuleChecker):
    """Example rule: meshes shall have normals."""
    def __init__(self):
        super().__init__("VG.027", "meshes shall have normals")

    def check(self, prim):
        # Implementation to check for normals on mesh prims
        pass

class ConditionalPropertyRule(BaseRuleChecker):
    """Example rule: if property A is set, property B must also be present and within a compatible range."""
    def __init__(self):
        super().__init__("COND.001", "if property A is set, property B must also be present and within a compatible range")

    def check(self, prim):
        # Implementation for conditional property validation
        pass

```