Unable to find shaders used for the terrain engine

I use the terrain (BuildPipeline.BuildAssetBundle(tobj, null, path)) packaged into “.unity3d”, results webplayer dynamically loaded ground texture becomes very blurred, view logs found that:
(webplayer.log)
Unable to find shaders used for the terrain engine. Please include Nature/Terrain/Diffuse shader in Graphics settings.

This should be correct:

help! thanks!

Just as it says, you need to go to Edit->Project Settings->Graphics, and add Nature/Terrain/Diffuse to the “Always Included Shaders” array. The trick is that you need to look for it at the bottom of the standard shader list: the list uses some strange sort order.