World Settings

Oclusão ambiente

Reference

Panel

World ‣ Ambient Occlusion

Ambient occlusion is a lighting method based on how much a point on a surface is occluded by nearby surfaces. It simulates soft global illumination shadows by faking darkness perceived in corners and at mesh intersections, creases, and cracks, where ambient light is occluded, or blocked. This is a trick that is not physically accurate, but it is useful to emphasize the shapes of surfaces, or as a cheap way to get an effect that looks a bit like indirect lighting.

Fator

The strength of the ambient occlusion; value 1.0 is like a white world shader.

Distância

Distância do ponto de sombreamento ao raio traço. Uma distância menor enfatiza características próximas, enquanto distâncias maiores levam em conta objetos mais distantes.

Lighting from ambient occlusion is only applied to diffuse reflection BSDFs; glossy or transmission BSDFs are not affected. Transparency of surfaces will be taken into account, i.e. a half-transparent surface will only half occlude.

An alternative method of using Ambient Occlusion on a per-shader basis is to use the Ambient Occlusion shader.

Passo de névoa

Reference

Panel

Ambiente (Mundo) ‣ Passo de névoa

Nota

The mist pass must be enabled in the View Layer tab of the Properties Editor before the settings below are available in the World tab.

Mist can greatly enhance the illusion of depth in your rendering. To create mist, Blender generates a render layer with a depth map ranging between 0.0 and 1.0 that can be used in the Compositor to generate a mist effect.

Início

The distance from the camera at which the mist starts to fade in.

Profundidade

The distance from Start of the mist, that it fades in over. Objects further from the camera than Start + Depth are completely hidden by the mist.

Decaimento

The curve function that controls the rate of change of the mist’s strength further and further into the distance.

Quadrático(a)

Use o mesmo cálculo como decaimento de luz (\(1\over{x^2}\)) e fornece a transição mais suave do transparente (0.0) ao opaco (1.0).

Linear

Início mais íngreme que quadrático (\(1\over{x}\)).

Quadrático(a) inverso(a)

Início mais íngreme (\(1\over{\sqrt{x}}\)) e aproxima-se de 1.0 mais rápido que as outras duas funções.

Dica

A visualization can be activated in the Camera ‣ Viewport Display panel.

Mist example (blend-file).

Configurações

Reference

Panel

Ambiente (Mundo) ‣ Configurações

Superfície

Amostragem

Controls the sampling method for the world material. Selecting Auto or Manual enables Multiple Importance Sampling while None disables it. Multiple Importance Sampling is a method to sample the background texture such that lighter parts are favored, creating an importance map. It will produce less noise in the render in trade of artifacts (Fireflies). Enable this when using an image texture with small area lights (like the sun), otherwise noise can take a long time to converge.

Below is a comparison between Multiple Importance Sample off and on. Both images are rendered for 25 seconds (Off: 1,500 samples, On: 1,000 samples).

Amostra de múltipla importância desligada.

Amostra de múltipla importância ligada.

Resolução de mapa

Sets the resolution of the importance map. A higher resolution will better detect small features in the map and give more accurate sampling but conversely will take up more memory and render slightly slower. Higher values also may produce less noise when using high-res images.

Máximo de rebatimentos

Número máximo de rebatimentos que a luz do plano de fundo contribuirá para a renderização.

Veja também

Veja Reducing Noise para mais informações em como reduzir o ruído.

Volume

Método de amostragem

Distância

For dense volumes lit from far away Distance sampling is more efficient in most cases. Usually this shouldn’t be used for World volumes.

Equiangular

Se você tem uma luz dentro ou perto do volume então amostragem equiangular é melhor

Múltipla importância

Se você tem uma combinação de ambas, então a amostragem de importância múltipla será melhor.

Interpolation

Método de interpolação a ser utilizado para volumes.

Linear

Simple interpolation which gives good results for thin volumes.

Cubic

Smoothed high-quality interpolation needed for more dense volumes, but slower.

Homogeneous Volume

Assume volume has the same density everywhere (not using any textures), for faster rendering. Usually this is automatically determined by the renderer. This settings provides a manual control for cases where it is not detected.

Tamanho dos passos

Distance between volume shader samples for world volume shaders. See Volume Render Settings for more information.

Ray Visibility

Reference

Panel

Ambiente (Mundo) ‣ Visibilidade dos raios projetados

Como outros objetos, Visibilidade dos raios projetados permite você controlar qual outro sombreador pode «ver» o ambiente.

Truques

Sometimes it may be useful to have a different background that is directly visible versus one that is indirectly lighting the objects. A simple solution to this is to add a Mix node, with the Blend Factor set to Is Camera Ray. The first input color is then the indirect color, and the second the directly visible color. This is useful when using a high-res image for the background and a low-res image for the actual lighting.

Similarmente, adicionando os raios São raios para a câmera e São raios para o polimento significa que a imagem de alta resolução também será visível nas reflexões.

Nós para o truque acima.