I’ve made my billboard distance quite short so you can see the difference; the lighter coloured trees/bushes (in contrast to the darker ones at the bottom) are the billboard versions of the speedtrees that populate my terrain.
Why are they so bright? I’ve messed around with the Ambient Occlusion, scene lighting, etc. etc. but nothing fixes this. And yes, it looks the same in game mode and in the build.
This ISN’T using speedtree, but the built-in Unity tree creator.
Any ideas??
Edit: I think what I want might not be possible with billboards… any other ideas on how I can render more trees in the distance without them being full res? (Bonus points if this is still using the built in terrain-tree system) Even if it has to be billboards then how to get them to be lit the same way as the 3D trees?
I’ve found a happy medium for now. Set the translucency colour to grey (128, 128, 128), the dependency to 0, shadow strength to 0.5, ambient occlusion ON and intensity to 0.2. Do this by dragging in your tree prefab onto the scene, changing the values and then applying the prefab.
I think it’s just something we have to deal with when it comes to billboards because it doesn’t make sense for a 2D image to react to 3D lighting all around.
I wonder if there’s a way to, instead of turning the trees into billboards, they turn into low-res meshes?..
Low poly mesh tree is a lot better than billboard. You can use a 4 side billboard as LOD2 slot for performance reasons. (Just for side view).
Unity 4 billboard trees works prefect with both dynamic and Lightmapped lightings.
How do I get the tree mechanic in the terrain system to use a 4-sided billboard? And are Unity 4 billboard trees different from unity 5 billboard trees? And any way I could get the terrain system to use low-poly mesh trees instead of billboard?
No. Unity terrain system is not good for place trees. You can make LOD of your trees and paint with prefab painters on ground. Set an 4 sided tree billboard as LOD2 slot and paint to your terrain.
For culling, you can use Per Layer Camera Clipping as well. I have tested this option in my mobile games and is a lot better in performance compare to unity terrain system trees. Also scene lighting is a lot better with mesh tree . You can also light mapping your scene easily.
Unity terrain system grass and trees uses a lot of memory and some times my game is crashed in low end devices. Billboard system is just good for sand box games.
Unity 4 terrain system is not different. Just Unity 5 lighting has a few bugs in some cases.
Okay, is there any way I can add a low poly mesh tree between the full-res mesh tree and the billboard one? I think it’s a bit lazy that all Unity did was give you those two options; the difference in detail between the two is too jarring to fade between them properly. Can I add another ‘level of quality’ between them so that it can still be used by the tree painter on the terrain?
Or is it just as efficient to simply make 3 separate prefabs (full mesh, half res mesh and billboard) for each tree, blend between them in a script and place them on the terrain manually as game-objects?
You need to use Level of Detail component in your models. Or just simply use Simplygon to create automatically level of details(LOD) for your models. Unity doesn’t support fade option.
Was really excited to use Simplygon but looks like they’ve abandoned the asset; you need to login with an account to use it but there’s no way of getting an account. So many people complaining in the asset reviews, it’s kind of strange…
Okay, solution found!
Simply get an empty object, apply the LOD Group component and attach the different LODs as children (each child is a tree or billboard). Save the new empty object as a prefab (make sure you configure your LODs, obviously). Then just import it as a tree in the tree painter for the terrain!
Why was this so tough to discover?! Haha.
I won’t have them looking directly at the camera because it’s weird in first person. I’ll have them look at the x,z position instead.
Okay so I’ve got it working quite efficiently with my above set-up, however there’s one last issue.
So I make this LOD prefab with the separate quality trees as children (high, low, billboard) and if I place the prefab into the scene (as a gameobject) it reacts to the wind zone like it should. But for some reason, when the prefab is painted on to the terrain as a tree, it doesn’t react to the wind at all! Why’s this?
Okay so I’ve got a good set-up now that essentially disregards Unity’s terrain tree system. Instead I use it to just paint on the trees but then my method works its magic and boom, results! I might sell this set-up on the asset store so I’ll contemplate that idea (it’ll be super cheap though). It’s mainly my script that you use at the end so it’s more-so the way you do this all.
This basically means that you can make trees with multiple LOD groups, paint them on the terrain, take advantage of wind and not suffer any performance loss. As far as I can tell, it seems better than the built-in terrain tree system. I’m getting around 200-300 set passes in a very dense forest with dense grass, image effects, advanced water, etc. running at a smooth 60fps on ultra settings. I know it’s not the most specific description of how good the performance is here, but take my word for it that it’s running silky smooth.
