I’ve modeled a terrain using sketchup’s sandbox (attached print screen), and then applied the skatter’s library grass (medium size I guess). The thing is that the rendered grass (via vray) is not coming up as it should be. I have in the past rendered flat surfaces, including on this particular model, and it works just fine.
So I conclude that it must be something with the sandboxed terrain (probably the fact that the triangulation of the terrain is pointing the faces to different places). Is there any way to get a good result in this kind of situations ?
When i look at your image, the grass is rotated at a certain axis. Thats weird cause i dont see that with my models. Im using thearender though. Perhaps you should check the models, i think there is a error in there.
But the i noticed that using a big non flat surface makes lines in the skatter. I report this as a bug
For some reason, I noticed that sometimes the surfaces generated by the Sandbox tool have very weird normals. I don’t know why, and I don’t think I can do anything about it from Skatter.
As the grass presets are configured to have the pointing direction halfway between the up axis and the surface normal, your components end up rotated sideways.
The workaround I found is to explode the group generated by Sandbox, then group the geometry again, and then start Skattering.
Because the objects are very small compared to the size of the faces. With bigger objects it wouldn’t be as visible.
The angle may be small, it still exists. And it’s especially visible when the light is almost parallel to the faces.