Terrain Detail Meshes flying from left to right

Unity Engine
1

I downloaded the Big Enviroment pack, where detail meshes are used on the terrain and set to render as “Grass”.
If I check the terrain in editor while the game is in playmode, the detail meshes Do not move, this is fine to me, since I don’t want them to move with the wind settings.

Now in a new project I import these detail meshes, add them by myself on the terrain and go into play mode. But my detail meshes are flying all over the place like the whole ground is shaking from left to right.
If I set rendermode to “vertex lit”, they won’t move, but I nor have alpha enabled on them, they are just rendered as non alpha planes.

My question is, why in project 1, detail meshes with rendermode “grass” won’t move ( is fine to me ) and in project 2, they move??
On both terrain the settings are equal as well the prefab used for detail mesh is identical ( did export selected and imported them )

I googled around, and it seams whole bunch of people encountered this since 2.5 and up. How can I have bushes on the terrain not shifting from left to right and render alpha? It seams mission impossible so far, however on another project from the asset store, it just works like I would. But I can’t find the option disabling the wind of a certain detail mesh and still render alpha

I hope someone can help me out.

2

You could edit the shader to disable wind if you don’t need it.

3

Which shader do I need to edit for the grass detail mesh? =)

4

Oh sorry, I didn’t at first realize what detail meshes you meant, cause I have never used those, only the texture grass…
But anyways the waving is controlled in shader include file named TerrainEngine.cginc (download stock shader source to edit it), there is ‘fixed4 TerrainWaveGrass’ thingy that makes them wave…
If it’s ok for you that the details won’t move, you can just disable the detail waving there. But that will also disable texture grass waves :confused: hmm…

5

Yeah that’s the point, waving texture grass is fine, waving meshes like rocks isn’t. Somehow this is a weird thing.

6

Does the detail grass wave ok, or off-centered like moving sideways not tilting?
You can enable the vertexlit mode only for rocks and other solid objects. Then you have waving grass and non-waving rocks.

7

Waving is controlled by a special uv map you have to set up on the detail mesh; if that doesn’t exist then it will wave the whole thing at the same rate which makes it look like it’s floating back and forth. So usually you can do what miksumortii suggests and use Vertex Lit for things that don’t have the map set up (like rocks or custom meshes). Also, look at the Big Environment scene and see if it has a custom texture shader replacement somewhere (usually in a folder named plugins) It might be using a special shader like one of larsbetram’s ATS shaders (it will be named something like CustomATSTerrain). If so, you can try copying that script to your new scene.

8

That special uv map is setup via the meshe’s own shader? Would you care to explain how to i set this up?