post_filter_wet

This postprocess material allows you to create an effect of a reflective wet surface, with water flowing down it. (See how to apply a postprocess material to the selected surface).

NoticeThe material is mapped only along the X and Y axes. If a surface is not slanted to any side and completely flat, there will be no water flow on it (only reflection).

Wet material postprocess

GUI name	XML name	Description	Channels
Normal	normal	A normal map that controls the flow of the water stream down the surface.	RG with two components of a normal. The third component is calculated from the stored components.
Reflection	reflection	Static reflection cube map used for wet surfaces.	RGBA

Base Parameters#

GUI name

XML name

Description

Normal transform

normal_transform

Coordinate transformation for the normal texture.

The 1-st and the 2-nd vector components scale texture coordinates by the X and Y axis respectively.
The 3-rd and the 4-th vector components specify an offset by X and Y respectively.
- To increase/decrease the speed of water flowing down, increase/decrease the multiplier for time in the 4th vector component.
- To add slant movement (i.e. to offset along X axis as well), specify time in the 3rd vector component.

Normal threshold

normal_threshold

Threshold for interacting with normals of the mesh surface. It controls if the water does not flow over bottom surfaces (with negative normals along the Z axis).

By the minimum value of 0, water flows down all surfaces, no matter what normals they have.
By the higher value, the wet postprocess material is not applied for bottom surfaces that face down.


Normal threshold = 0 (all surfaces are wet)	Normal threshold = 2 (surfaces that face down are not wet)

Reflection distance

reflection_distance

Distance in units up to which no wet process is rendered on surfaces. This option allows to optimize the performance when using the wet postprocess.

Reflection Parameters#

GUI name

XML name

Description

Normal

reflection_normal

Multiplier for wet texture normals. It controls the intensity of water flow according to the wet material normal map.

By the minimum value of 0, no water flow is rendered (wet normals have no influence on the final image).
The higher value, the higher the wet normal map influence and the more visible the water flow is.


Normal = 0 (no water flow)	Normal = 4

Color

reflection_color

Color multiplier for wet surfaces.

White color means no color transformation for wet surfaces.

Scale

reflection_scale

Multiplier for wet Color.

The higher the value, the brighter the color is.

Shading Parameters#

GUI name	XML name	Description
Fresnel bias	fresnel_bias	Coefficient that allows to compensate for the Fresnel effect. It sets the minimum necessary reflectance level (i.e. restores reflections to be seen at all viewing angles). By the minimum value of 0, there is no compensation for Fresnel power. Increasing the value leads to more prominent reflections. By the maximum value of 1, reflections are at their maximum and the Fresnel power parameter does not influence the rendered image.
Fresnel power	fresnel_power	Factor to scale Fresnel effect that defines the amount of reflectance depending on the viewing angle: Low values provide good reflectance even at a large viewing angles. High values provide the reflectance only at a small viewing angle. When looking at a large viewing angle, from above, there are no reflections rendered. Notice If the Fresnel bias equals 1, Fresnel power does not apply.

GUI name	XML name	Description
Mask	mask	Color mask for the material's auxiliary color. Use this mask to apply a postprocess only to materials with a certain auxiliary color value set.

In This Article:

Textures#

Parameters#

Base Parameters#

Reflection Parameters#

Shading Parameters#

States#