Erreur de build

Bonsoir
j’aimerais en gros, avoir la traduction des erreurs qui s’affichent quand je fais un build de ma scène extérieure, pour voir à quel point j’en suis, si c’est des erreurs importantes etc…
je met un copié/collé des erreurs :

InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent was too big and it was automatically reduced. Consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component’s lightmap resolution or number of mesh instances in this component
No importance volume found and the scene is so large that the automatically synthesized volume will not yield good results. Please add a tightly bounding lightmass importance volume to optimize your scene’s quality and lighting build times.

voila donc ça en fait un bon gros paquet, si quelqu’un est capable de me décrire tout ça ça m’aiderai !
Merci à vous