光源参数

Toggles rendering of shadows from the light source on and off.切换光源的阴影渲染。

Shadows from Light Omni enabled (the left cube) and disabled (the right cube)来自Light Omni的阴影已启用（左侧多维数据集）和已禁用（右侧多维数据集）

Is available when the Static light mode is enabled. Two shadow modes are available:启用Static灯光模式时可用。有两种阴影模式可用：

• Mixed. Shadows from surfaces with both static and dynamic shadow mode are rendered as follows: the dynamic shadow map is merged with the static depth texture and the result is rendered.Mixed。静态和动态表面上的阴影阴影模式渲染如下：动态阴影贴图与静态阴影贴图合并深度纹理并呈现结果。
• Static. Only shadows from surfaces with the static shadow mode enabled are rendered. These shadows are stored in the depth texture.Static。仅带有静态表面的阴影阴影模式启用。这些阴影存储在深度纹理。

For fine-tuning static light and shadows, see the optimization recommendations.要微调静态光和阴影，请参见优化建议。

Size of the shadow map that defines the shadow quality.定义阴影质量的阴影贴图的大小。

• The higher the resolution, the smoother and true to life the result is.分辨率越高，结果越平滑，逼真。
• The lower the resolution, the more blocky and jagged the shadow outline appears.分辨率越低，阴影轮廓越显得块状和锯齿状。

Shadow resolution = 64阴影分辨率= 64	Shadow resolution = 512阴影分辨率= 512

注意

A shadow map is a 32-bit texture (in case of Light Omni, it's a 2D texture array ), and higher resolution significantly increases memory consumption. Moreover, heavy 4K shadow maps for lights with Mixed shadow mode enabled may significantly affect performance due to blending of baked and dynamicshadow maps.阴影贴图是32位纹理（在Light Omni的情况下，它是2D纹理数组），而更高的分辨率会显着增加内存消耗。此外，启用Mixed阴影模式的灯光的重4K阴影贴图可能会由于混合烘焙和动态阴影贴图而严重影响性能.

Shadow bias that is used to correct inexact shadowing of the scene objects. It controls the depth offset added to the current depth value stored in the shadow map. Such offset is adaptively calculated taking into account the slope angle of the light source, its resolution, and the distance to the light source at shadow map application.阴影偏差，用于校正场景对象的不精确阴影。它控制添加到阴影贴图中存储的当前深度值的深度偏移。考虑到光源的倾斜角度，其分辨率以及在阴影贴图应用中到光源的距离，可以自适应地计算这种偏移。

• If the shadow acne appears, the bias value should be increased. This procedure eliminates the self-shadowing effect, as the points will appear closer to light source when compared to the map depth value.如果出现暗疮痤疮，则应增加偏压值。此过程消除了自阴影效应，因为与地图深度值相比，这些点将看起来更靠近光源。
• If the bias value is set too high, the shadow will look detached from the object casting it (see the 3rd picture below).如果偏置值设置得太高，阴影将看起来与投射阴影的对象分离（请参见下面的第三张图片）。

Bias = 0; Normal bias = 1

Bias = 4; Normal bias = 1

Bias = 30; Normal bias = 1

Shadow bias that is achieved by shifting the surface on which the shadow falls. The surface is shifted along normals stored in the normal map.通过移动阴影落在其上的表面而获得的阴影偏差。曲面沿法线贴图中存储的法线移动。

Normal bias = 0; Bias = 1	Normal bias = 2; Bias = 1

Depending on the normal map of the surface, the shadow may differ for the same values of Normal Bias.根据表面的法线贴图，对于相同的Normal Bias值，阴影可能会有所不同。

Normal bias = 2	Normal bias = 2

Filtering mode to be used to reduce the stair-step effect for soft shadows making the edges smoother.用于减少柔和阴影的阶梯效果以使边缘更平滑的滤镜模式。

• Global — filtering mode selected globally in the Settings window is to be used for shadows.Global —全局选择的过滤模式在Settings窗口中将用于阴影。
• Disabled — filtering for shadows is disabled, the stair-step effect is clearly seen at the edges of shadows.Disabled —禁用阴影过滤，在阴影边缘清楚地看到阶梯效果。
• Low, Medium, High, Ultra — filtering quality modes from the lightest to the heaviest one, which best reduces the stair-step effect but has a more significant impact on performance.Low, Medium, High, Ultra —从最轻到最重的质量模式进行过滤，这可以最大程度地减少阶梯效应，但对性能的影响更大。

Quality mode to be used for penumbra rendering. This mode enables simulation of real-world shadows by keeping sharp contact shadows closer to the base and softening the farther the shadow stretches away.用于半影渲染的质量模式。通过使尖锐的接触阴影靠近底部并柔化阴影延伸得越远，此模式可以模拟真实世界的阴影。

• Global — quality mode selected globally in the Settings window is to be used for penumbra rendering.Global —全局选择的质量模式在“设置”窗口中将用于半影渲染。
• Disabled — penumbra rendering is disabled, shadow edges are crisp and sharp (no soft shadows at all).Disabled —禁用半影渲染，阴影边缘清晰明快（完全没有柔和阴影）。
• Low, Medium, High, Ultra — quality modes from the lowest to the best one, which has a more significant impact on performance.Low, Medium, High, Ultra —从最低到最佳的质量模式，这对性能有更大的影响。

Intensity of penumbra for the selected mode:所选模式的半影强度：

• Low values correspond to sharper shadow edges.较低的值对应于较锐利的阴影边缘。
• Higher values increase penumbra size.较高的值会增加半影的大小。

Enables or disables screen space shadows from the light source.启用或禁用光源的屏幕空间阴影。

Screen Space Shadows from Light Omni on (the left cube) and off (the right cube). Shadows are disabled.屏幕空间阴影从Light Omni启用（左侧多维数据集）和禁用（右侧多维数据集）。阴影被禁用。

Number of rays used in screen space ray tracing. The higher the number of rays, the more accurate the computation of pixel shading is.屏幕空间光线跟踪中使用的光线数。光线数量越多，像素阴影的计算越准确。

Number of Rays = 1	Number of Rays = 15

Number of steps each ray traces. The higher the number of steps, the more accurate the computation of pixel shading is.每个射线跟踪的步数。步骤数越多，像素阴影的计算越准确。

Number of Steps = 4; Number of Rays = 1	Number of Steps = 32; Number of Rays = 1

Ray tracing dispersion. The higher the noise, the more chaotic the direction of rays is.光线追踪色散。噪声越高，光线的方向越混乱。

Noise Ray = 0.5	Noise Ray = 0

Dispersion of steps. The higher the noise, the more scattering the steps are.分散步骤。噪声越高，台阶越分散。

Noise Step = 0.5; Noise Ray = 0.5	Noise Step = 0; Noise Ray = 0.5

Depending on the value of the Noise Ray parameter, the shadow may differ for the same values of Noise Step.根据值噪音射线参数，对于相同的Noise Step值，阴影可能会有所不同。

Noise Step = 0.5; Noise Ray = 0	Noise Step = 0; Noise Ray = 0

Length of each step used in ray-traced shadows within Near Step Size Distance.在Near Step Size Distance范围内的光线跟踪阴影中使用的每个步骤的长度。

• Low values cause the closest pixels to shade.较低的值会导致最接近的像素被遮挡。
• Higher values lengthen the shadow spreading.较高的值会延长阴影扩散。
• Too high values can provoke shadow gaps.太高的值会引起阴影间隙。

Step Size = 0.5	Step Size = 20

Threshold value for Near Step Size. This value defines the limit of samples passing the screen-space shadowing.Near Step Size的阈值。此值定义通过屏幕空间阴影的样本的限制。

• Low values let pass more samples which causes the shading of inappropriate pixels.较低的值会使更多的样本通过，从而造成不适当像素的阴影。
• Higher values can also cause inaccurate shading by limiting appropriate samples.较高的值也会通过限制适当的样本来导致不正确的阴影。

Threshold = 0

Threshold = 1

Threshold = 4

Size of the blur applied to the shadow edge.应用于阴影边缘的模糊大小。

• Low softness values corresponds to the crisp and sharp shadow edges.低的柔度值对应于清晰的阴影边缘。
• Higher softness values serve to accentuate the effect of soft indirect lighting.较高的柔度值可增强柔和间接照明的效果。