1---- 2 3Fading 4~~~~~~ 5When fading is supported on a model layer, you can control it like so:: 6 7 <model ... 8 <fading duration = "1.0" 9 max_range = "6000" 10 attenuation_distance = "1000" /> 11 12Properties: 13 14 :duration: Time over which to fade in (seconds) 15 :max_range: Distance at which to start the fade-in 16 :attenuation_distance: Distance over which to fade in 17 18 19Shader Policy 20~~~~~~~~~~~~~ 21Some drivers support a *shader policy* that lets you control how (or whether) 22to generate shaders for external geometry. For example, if you want to load 23an external model via a stylesheet, but do NOT want osgEarth to generate 24shaders for it:: 25 26 <model ... 27 <shader_policy>disable</shader_policy> 28