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90 lines
3.8 KiB
ReStructuredText
90 lines
3.8 KiB
ReStructuredText
Custom Shader Effects
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#####################
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OpenMW leverages the `NiStringExtraData` node to inject special shader flags and effects.
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This node must have the prefix `omw:data` and have a valid JSON object that follows.
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.. note::
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This is a new feature to inject OpenMW-specific shader effects. By default,
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the shader effects will propagate to all of a node's children.
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Other propagation modes and effects will come with future releases.
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Soft Effect
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-----------
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This effect softens the intersection of alpha-blended planes with other opaque
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geometry. This effect is automatically applied to all particle systems, but can
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be applied to any mesh or node. This is useful when layering many alpha-blended
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planes for various effects like steam over a hotspring or low hanging fog for
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dungeons.
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To use this feature the :ref:`soft particles` setting must be enabled.
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This setting can either be activated in the OpenMW launcher or changed in `settings.cfg`:
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::
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[Shaders]
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soft particles = true
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Variables.
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+--------------+--------------------------------------------------------------------------------------------------------+---------+---------+
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| Name | Description | Type | Default |
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+--------------+--------------------------------------------------------------------------------------------------------+---------+---------+
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| size | Scaling ratio. Larger values will make a softer fade effect. Larger geometry requires higher values. | integer | 45 |
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+--------------+--------------------------------------------------------------------------------------------------------+---------+---------+
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| falloff | Fades away geometry as camera gets closer. Geometry full fades when parallel to camera. | boolean | false |
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+--------------+--------------------------------------------------------------------------------------------------------+---------+---------+
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| falloffDepth | The units at which geometry starts to fade. | float | 300 |
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+--------------+--------------------------------------------------------------------------------------------------------+---------+---------+
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Example usage.
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::
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omw:data {
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"shader" : {
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"soft_effect" : {
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"size": 250,
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"falloff" : false,
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"falloffDepth": 5,
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}
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}
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}
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Distortion
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----------
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This effect is used to imitate effects such as refraction and heat distortion. A common use case is to assign a normal map to the
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diffuse slot to a material and add uv scrolling. The red and green channels of the texture are used to offset the final scene texture.
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Blue and alpha channels are ignored.
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To use this feature the :ref:`post processing` setting must be enabled.
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This setting can either be activated in the OpenMW launcher, in-game, or changed in `settings.cfg`:
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::
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[Post Processing]
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enabled = false
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Variables.
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+---------+--------------------------------------------------------------------------------------------------------+---------+---------+
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| Name | Description | Type | Default |
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+---------+--------------------------------------------------------------------------------------------------------+---------+---------+
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| strength| The strength of the distortion effect. Scales linearly. | float | 0.1 |
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+---------+--------------------------------------------------------------------------------------------------------+---------+---------+
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Example usage.
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::
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omw:data {
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"shader" : {
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"distortion" : {
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"strength": 0.12,
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}
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}
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}
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