I am currently architecting a massive landscape project and want to utilize the new Nanite tessellation features in Unreal Engine 5.4 to reduce dependency on traditional heightmap displacement. Does this significantly impact the VRAM overhead on mid-range GPUs like the RTX 3060, or is it optimized enough for shipping commercial titles in late 2024?
3 answers
Having integrated Nanite tessellation into a forest biome project last month, I can say the stability is impressive compared to the early 5.2 builds. The VRAM overhead is definitely there, but it is much more manageable than traditional high-poly displacement because it scales dynamically with the screen percentage. On an RTX 3060, we maintained a steady 60fps at 1440p using DLSS Balanced mode. The key is to ensure your virtual shadow maps are configured correctly, as that is where the real performance hit happens when you have millions of tiny geometric details shifting.
Does the new tessellation system play well with runtime landscape deformation, like craters or trenches, without causing visible seams at the Nanite cluster borders?
It’s a game-changer for rocky terrains. We cut our mesh memory usage by 30% because we no longer need high-res baked displacement maps on every single rock asset.
Spot on, Gregory. The reduction in texture memory alone makes up for the slight increase in compute cost. It’s definitely the new standard for high-fidelity environment art.
Jeffrey, I've tested this extensively. While static meshes are flawless, landscape deformation still requires some careful material blending to avoid those micro-seams. If you use a Triplanar mapping approach within your landscape material, it hides the cluster transitions much better during real-time deformation.