Ghostxx,CG网站,CG资源

Dynamic Tesselation v4.5

Blender 动态细分插件。

什么是动态细分？
嗯，用 Blender 的术语来说，就是自适应细分。基本上，它是一种根据摄像机距离和视锥体动态细分对象的方法。

为什么？
简而言之，Blender 内置的这个功能占用的显存太多了。即使在非常简单的场景中，自适应细分修改器也会消耗大量显存，尤其是如果你像我一样显存不多的话。这是这个项目的起始目标，但这个节点组也开辟了许多其他可能性，其中之一是在 Eevee Next 中使用。截至 4.2，Eevee 有纹理置换，但没有动态细分。这意味着如果你想在 Eevee 中使用纹理置换，你必须细分整个对象，这非常不优化，但现在，它只是一个简单的节点组。你还可以用它做损伤效果，只需要细分一小块区域来添加细节。我还添加了一些在编辑模式下使用的几何节点工具，我们稍后会详细讨论。

缺点
虽然这个节点组很好，但它不是万能的解决方案。如果你有大量显存，那么可能不太需要它，因为你可以承受内置自适应细分的冲击。这个节点组还会给你的 CPU 和内存（普通内存，不是显存） 带来相当大的负担，这可能是一个缺点。对我来说，我宁愿承受 CPU 的冲击而不是显存的冲击，但你可能不这么想。不过，即使你不想用它来替代自适应细分，它仍然可以用于我之前提到的其他方式。

What Is Dynamic Tessellation?
Well, in Blender terms, it's adaptive subdivision. Basically it's a method to subdivide an object dynamically based on camera distance and view frustum. Here is a video about it if you prefer to watch that.

Why?
Well put simply, the built‑in version of this feature takes WAY too much VRAM. Even in very simple scenes, the adaptive subd modifier can eat VRAM especially if you don't have that much like me. That was the starting goal for this project, but the node group also opens up a lot of other possibilities, one of which is use in Eevee Next. As of 4.2 Eevee has texture displacement, but no dynamic tessellation. This means if you want to use texture displacement in Eevee you have to subdivide the entire object which is incredibly unoptimal, but now, it's just a simple node group. Another thing you can do with it is damage effects where you only need to subdivide a small area to add detail. I've also added some geometry nodes tools which are used in edit mode which we will get into later.

Disadvantages
While this node group is nice, it's not a one size fits all solution. If you have a lot of VRAM then it might not be so needed as you can tank the hit from the built‑in adaptive subdivision. This node group is also going to be pretty heavy on your CPU and RAM (normal RAM not VRAM) which can be a downside. For me, I prefer to take the hit on my CPU instead of VRAM but you might not. Even if you don't want to use this as a replacement for adaptive subdivision though it can still be used in the other ways I mentioned earlier.