Does anyone know how to change the distance at which the speedtree LOD kicks in or even if it is possible to change. 

Thanks in advance

Homebuilt computer - Windoze 10, INTEL i9 9900 k @ 5.1 GHz, EVGA RTX 2080 TI XC ULTRA, 16GB 3100 MHz RAM, Asus  Maximus Hero XI motherboard, Sound blaster Z series. iClone6 & 7 Pipeline, Crazytalk 8, Crazytalk Animator 2, Facefilter, Pop video 3, Hitfilm 4Pro, Cubase 8.5 Pro,

You cannot set the distances, but you can very the amount with the level of detail slider in the preferences. Try setting it to maximum. You can set the display of objects to wireframe to get an idea of what it's doing when you zoom in and out.

Thanks Rampa, 

Homebuilt computer - Windoze 10, INTEL i9 9900 k @ 5.1 GHz, EVGA RTX 2080 TI XC ULTRA, 16GB 3100 MHz RAM, Asus  Maximus Hero XI motherboard, Sound blaster Z series. iClone6 & 7 Pipeline, Crazytalk 8, Crazytalk Animator 2, Facefilter, Pop video 3, Hitfilm 4Pro, Cubase 8.5 Pro,