why can I see relative move of the meshobject or grass object with respect to terrain when I rotate camera

[deitty]

HI there

when I rotate camera by pressing right mouse key, I can see the object_grass(same with other mesh object) move a little with respect to the terrain. why? I doesn't find this issue in the oil sample

[Amerio.Stephane]

Hi,

Most probably your grass object is very large (10km or more). Look at your camera position in your video sample: X=8km Y=16km. This is probably very far from the origin (pivot) of your grass. You should probably split up your grass in multiple nodes, each with a smaller size. The point is even though the engine runs with double precision globally, each object precision is still restricted to simple float precision.

[silent]

deitty

Looks like floating point precision issues. In Community version you can safely create worlds up to 10x10km.

Thanks!

[deitty]

18 hours ago, Amerio.Stephane said:

Hi,

Most probably your grass object is very large (10km or more). Look at your camera position in your video sample: X=8km Y=16km. This is probably very far from the origin (pivot) of your grass. You should probably split up your grass in multiple nodes, each with a smaller size. The point is even though the engine runs with double precision globally, each object precision is still restricted to simple float precision.

unfortunately, een if I use single mesh, I can see the position inconsitant with terrain when I rotate camera.