Birch Trees Package

This package contains a set of 8 highly detailed PBR birch trees – each consisting of 2–3 mesh based LODs and a billboard. The trees are manually modeled, carefully optimized, support instancing and only use 2 shared materials.

Documentation / Forum Thread

BIRP, URP and HDRP

In case you download the package using Unity 2019.4 or above you will get BIRP, URP and HDRP compatible trees and shaders. Shaders for URP 7.5.2, 10.3.2, 11.0, 12.0 and 14+ as well as HDRP 7.3 and 10.3.2. and above are included.

Since version 3.4 the package includes an installer script that will only install files needed according to your render pipeline. You have to download the package using Unity 2022.3.40 or above to get version 3.4.

Shaders for URP and HDRP and authored in Shader Graph and thus support all versions of Unity >= 2022.3.40. In case you use an older version of Unity you may get custom HLSL shaders. 

Rendering

The trees were created using CTI whose tree shaders support (deferred) translucent lighting, advanced bending driven by a built in directional wind zone and smooth LOD transitions. Unity's spherical wind zones are not supported.

In case you want to see how CTI's tree shaders work in action just grab the free Conifers package.

Compatibility BIRP

The trees have been successfully tested with Unity 5.6.3., Unity 2018.2.15 and Vegetation Studio Pro using instanced indirect rendering. A modified shader adaptor is included.

Deferred shading is compatible with Lux Plus, AFS and ATG and needs you to assign the provided or compatible deferred lighting and reflection shaders.

Compatibility

Unity's terrain engine is fully supported.

LOD triangle count

Birch A large: 4200/2400/1500 tris

Birch B thin: 3400/2000/1400 tris

Birch C wide: 5700/3000/2100 tris

Birch D generic: 3300/2100/1400 tris

Birch D crinkled: 4400/2800/1800 tris

Birch E small: 3700/2200/1500 tris

Birch F Sapling: 1900/1000/750 tris

Birch G Sapling: 1600/850 tris

Please note: LOD1 and LOD2 are modeled as LODs in mind so they are not suitable to be used at close distances.

Textures

The bark material comes with 2 different texture sets (lower and upper part) at 2K by 4K resolution and contains albedo, smoothness, specular, normal and ambient occlusion.

The leaf material uses 1 texture set and ships at 4K. It contains albedo, alpha, smoothness, specular, normal, ambient occlusion and translucency.

Legacy tree creator trees

The legacy tree creator birches are still included.