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Стекло имеетсвойство преломления.
Благодоря именно этому свойству во время просматрирования каких -либо объектов через стекло ,они будут казаться увеличенными(Масштабирование объекта).

Применение карты(MAP) Thin wall refraction

Алгоритм действий

Procedures(Алгоритм действий)To(для )assign(создания )the Thin Wall Refraction map to a material(эффекта тонкого увеличительного стекла):
0.Шаг

Tip
At 100% refraction and opacity, you can see no diffuse color or mapping, and there is not much illusion of a refractive material.
The effect is invisible. In the Maps rollout of the parent material, set Refraction Amount to 50%, and in the Basic Parameters rollout, set Opacity to a value greater than 0.

Material Editor > Maps rollout > Click a Map button. > Material/Map Browser > Thin Wall Refraction
Открыть редактор материалов

Click the Map button for Refraction in the material's Maps rollout.
1.1 in the material's Maps rollout.

1.2 Refraction .Click the Map button
In the Material/Map Browser, choose Thin Wall Refraction.
In the parent material,
3.1

3.2 set the Refraction Map Amount to 50%.
Assign the material to an object.
Adjust the map's parameters.(Настройте интерфейс параметров карты)

Interface(Параметры интерфейса карты)

Группа -Blur(Размытость изображения)

These controls are for antialiasing.

Apply Blur: Turns on filtering to blur the maps.
Blur: Affects the sharpness or blurriness of the generated map based on its distance from the object. The farther away the map is, the greater the blurring. Blur is primarily used to avoid aliasing. It's a good idea to use a small amount of blurring for all maps in order to avoid the scintillation or aliasing that can occur when pixel details are reduced off in the distance. Default=1.0.

Группа -Render(Визуализация)

These controls affect how the refraction should behave in animations.

First Frame Only: Tells the renderer to create the refracted image only on the first frame.

This is the fastest option. You can use it if the camera and refractive object don't move.
Every Nth Frame: Tells the renderer to regenerate the refracted image based on the frame rate set by the spinner.

Every single frame provides the most accurate result, but takes longest to render.
Use Environment Map: When off, environment maps are ignored by the refraction during rendering. It's useful to turn it this off when you have refractions in the scene and you're rotoscoping against a flat screen environment map. A screen environment map does not exist in 3D space the way the other environment map types do, and will not render properly. Default=on.

Группа -Refraction(Преломление)

These controls are specific to the Thin Wall Refraction effect:

Thickness Offset





Bump Map Effect(Эффект карты выдавливния): Позволяет изменить степень преломления лучей в зависимости от применения карты выдавливания.
Affects the magnitude of refraction due to the presence of a bump map. This parameter multiplies the current bump map Amount in the parent material. Reduce this value to reduce the effect of the secondary refraction; increase this value to increase the effect. If there is no bump map assigned, this value has no effect. Default=1.0.

If there is unevenness in the surface of the glass, there is a secondary refraction. Thin Wall Refraction generates this secondary refraction if the material also has a bump map present. The algorithm guesses at the scaling of the secondary refraction, and can create too large an effect. If this happens, scale the effect down by reducing this value to less than one.