ue5.1 lumen and nanite with raytraced gi environment and gameplay lookdev

using a different workflow for most of the assets in this scene. the base meshes were made in substance modeler and brought into ue5. the characters too were made in modeler but rigged in cc4 using the built in auto rigger and animated in iclone 8. for some reason rendering using the movie render queue always resulted in a crash in this scene so i ended up using obs to record everything which resulted in some frame rate issues. im guessing the problem lies in using ray tracing with so many instances but without raytracing im getting a lot of artifacts using only lumen, the main ones being a lot of gi in the foliage resulting in unnaturally lit grass and surrounding areas.