Foilage Issue: Rendering and Performance

[anonymous_user_848b907e]

Thanks, that information was really helpful.

Thanks a lot

[TimeSpirits]

@Greg.Croft;121360

Hello,

As for general optimization of grass, you’ll need to edit the densities and culling settings the same as you would for non- grass. Set a good far cull distance and utilize the PerInstanceFadeAmount node in the material to have a smooth transition there. Smaller foliage clusters will enable the grass to be culled closer to the frustum, but it’s a tradeoff against draw calls.

Hey Greg- I’ve never been able to get the PerIsntanceFadeAmount node working properly, do you have an example setup?

[anonymous_user_1ffa804e]

Why not use the UE4’s flip book baking thing for those foliages? I saw how it works before, it bakes all 3D stuff into a plane and actually rotates based on the angle you look at it, it looks pretty 3D and nice. Huge performance savior, should be used for foliage right on!

[anonymous_user_923c79df]

@;125276

Why not use the UE4’s flip book baking thing for those foliages? I saw how it works before, it bakes all 3D stuff into a plane and actually rotates based on the angle you look at it, it looks pretty 3D and nice. Huge performance savior, should be used for foliage right on!

You can see an example of this in the landscape mountain sample - in the material from the tree -> so with that it just uses 1 plane which rotates to the camera (billboard)

[anonymous_user_a006f79c]

I’ve got thousands of trees in a scene and performance is negligible, just make sure to import both 3D and Billboards, use occlusion culling when needed. The actual foliage runs like a dog for some reason and I’ve managed to get them down to 36 verts, still looking into why this is the case.