來一發(fā)LU反射小教程~

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This Lumion Mini-Tutorial will focus on better reflections for Opaque Reflective Surfaces.

這個小教程主要想說的是在Lumion 3.0中如何去得到更好的不透明反射效果。

Lumion-Tutorial-Planar-Reflections-with-NormalMaps-on-Opaque-Surfaces-1.jpg

It’s important to understand that by this I mean highly reflective surfaces without transparency. We won’t be using the Glass shader for this tutorial. Why? Simply put: Because we can’t. For instance, the glass shader does not support the necessary requirements to work with Normal Maps. Good news is on many occasions you can get away with the Standard Material for better reflections on Opaque Surfaces fine.

首先是要明白，我通過這個想說的是“不透明”的高反射面。在這個教程中，我沒有用玻璃材質(zhì)，為什么呢？玻璃材質(zhì)不支持我所需要的法線貼圖。好消息是，通常情況下，你可以通過標準材質(zhì)來得到更好的反射效果

Second thing to be aware of is that we will focus on highly reflective Glass-like surfaces. Planar Reflections are not limited to these but since floor-materials for example require a different approach, we will get to those in a later tutorial. So what about those reflections themselves? You’re getting a mirror effect? Too much noise quickly? What and How for better reflections really?

第二件需要注意的事是我們做的是高反射的“類似玻璃面”。平面反射并不局限于此，比如地板材質(zhì)的做法就不一樣，我們會在后來的教程中講解。那我們到底怎樣改進我們的反射呢？

Lumion-Tutorial-Planar-Reflections-with-NormalMaps-on-Opaque-Surfaces-5.jpg

CUSTOM NORMAL MAPS FOR BETTER REFLECTIONS!

定義一個法線貼圖來改善反射

What makes a good Normal Map for better reflections?

法線貼圖的要素：

It should preferably tile

最好是無縫貼圖

Support Lumion Standard Material

符合LU標準材質(zhì)的要求

Scale properly

大小合適

Not have any low-frequency detail or noise.

沒有噪點

Distort with a credible and interesting pattern

產(chǎn)生的扭曲也很真實

Simple and clean would probably best describe it.

簡單干凈

Lumion-Tutorial-Planar-Reflections-with-NormalMaps-on-Opaque-Surfaces-Polygons.jpg

As you can see there really ain’t much to this. All you need to do is use the Standard Material in Lumion, check out the settings provided (more or less).and experiment away until you discover something that fits your needs. Try not to overdo things. For the purpose of this Lumion Tutorial I’ve applied settings that could already be considered exaggerated. It’s also probably best to differentiate between settings for stills and animations. For animations you can go a bit more extreme as it will keep things interesting. For stills it’s easier to spot artifacts etc.

你可以看到，真的沒有什么技術含量。你所需要做的僅僅是使用LU的標準材質(zhì)，然后再看看我提供的參數(shù)，然后實驗一下，直到你找到適應你的參數(shù)。不要太過，因為我給的參數(shù)已經(jīng)有些夸張了。這應該也是在靜幀和動畫之間最平衡的參數(shù)了。對于動畫，可以稍微再夸張一點，來得到一個更有趣的效果，對于靜幀，更容易去找到合適的反射。

TIPS & TRICKS:

小提示：我就不翻譯了，自己翻譯去吧。哇哈哈哈哈

There is a shadow clipping bug in Lumion preventing shadows from showing up inside reflections close to the camera when using the Planar Reflections effect. Update on Lumion 3.1 > Remko reports this bug should now be fixed in Lumion 3.1

Try and use single polygon planes for Geometry when using Planar Reflections. This helps avoid certain black-banding artifacts when distorting the reflections with Normal Maps.

Tweak your settings from inside Movie or Photo Mode via the Effects On menu which will allow you to preview Planar Reflections whilst editing them.

Use as little Planar Reflection effects as possible since they are very resource intensive.

Drop an interesting texture onto Glass opposing the facade you have applied Planar Reflections to. This is a great way of adding a ton of free detail to your scene. If you don’t have a clue what I mean by this, no worries cause it’s a bit cryptic indeed. I will go into more detail on adding quick details to your scene in another mini-tutorial soon (Thanks Chase for pointing this out ).

Don’t forget to use the ‘Reduce Errors/Flickering’ slider in the Planar Reflection effect when using it for animations.