public void RemoveHydraxDepthTechniques()
{
foreach (string material in hydraxDepthMaterials)
{
MaterialPtr m = MaterialManager.Singleton.GetByName(material);
if (m != null && m.GetTechnique("_Hydrax_Depth_Technique") != null)
{
m.RemoveTechnique(hydraxDepthMaterialsMap[material]);
m = null;
}
}
}