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305 lines
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305 lines
10 KiB
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Shaders Settings
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################
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force shaders
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-------------
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:Type: boolean
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:Range: True/False
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:Default: False
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Force rendering with shaders. By default, only bump-mapped objects will use shaders.
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Enabling this option may cause slightly different visuals if the "clamp lighting" option is set to false.
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Otherwise, there should not be a visual difference.
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Please note enabling shaders has a significant performance impact on most systems.
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force per pixel lighting
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------------------------
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:Type: boolean
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:Range: True/False
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:Default: False
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Force the use of per pixel lighting. By default, only bump mapped objects use per-pixel lighting.
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Has no effect if the 'force shaders' option is false.
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Enabling per-pixel lighting results in visual differences to the original MW engine.
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It is not recommended to enable this option when using vanilla Morrowind files,
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because certain lights in Morrowind rely on vertex lighting to look as intended.
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Note that groundcover shaders ignore this setting.
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clamp lighting
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--------------
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:Type: boolean
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:Range: True/False
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:Default: True
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Restrict the amount of lighting that an object can receive to a maximum of (1,1,1).
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Only affects objects that render with shaders (see 'force shaders' option).
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Always affects terrain.
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Leaving this option at its default makes the lighting compatible with Morrowind's fixed-function method,
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but the lighting may appear dull and there might be colour shifts.
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Setting this option to 'false' results in more dynamic lighting.
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auto use object normal maps
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---------------------------
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:Type: boolean
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:Range: True/False
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:Default: False
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If this option is enabled, normal maps are automatically recognized and used if they are named appropriately
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(see 'normal map pattern', e.g. for a base texture foo.dds, the normal map texture would have to be named foo_n.dds).
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If this option is disabled,
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normal maps are only used if they are explicitly listed within the mesh file (.nif or .osg file). Affects objects.
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auto use object specular maps
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-----------------------------
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:Type: boolean
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:Range: True/False
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:Default: False
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If this option is enabled, specular maps are automatically recognized and used if they are named appropriately
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(see 'specular map pattern', e.g. for a base texture foo.dds,
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the specular map texture would have to be named foo_spec.dds).
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If this option is disabled, normal maps are only used if they are explicitly listed within the mesh file
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(.osg file, not supported in .nif files). Affects objects.
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auto use terrain normal maps
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----------------------------
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:Type: boolean
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:Range: True/False
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:Default: False
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See 'auto use object normal maps'. Affects terrain.
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auto use terrain specular maps
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------------------------------
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:Type: boolean
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:Range: True/False
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:Default: False
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If a file with pattern 'terrain specular map pattern' exists, use that file as a 'diffuse specular' map.
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The texture must contain the layer colour in the RGB channel (as usual), and a specular multiplier in the alpha channel.
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normal map pattern
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------------------
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:Type: string
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:Range:
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:Default: _n
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The filename pattern to probe for when detecting normal maps
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(see 'auto use object normal maps', 'auto use terrain normal maps')
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normal height map pattern
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-------------------------
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:Type: string
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:Range:
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:Default: _nh
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Alternative filename pattern to probe for when detecting normal maps.
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Files with this pattern are expected to include 'height' in the alpha channel.
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This height is used for parallax effects. Works for both terrain and objects.
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specular map pattern
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--------------------
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:Type: string
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:Range:
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:Default: _spec
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The filename pattern to probe for when detecting object specular maps (see 'auto use object specular maps')
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terrain specular map pattern
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----------------------------
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:Type: string
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:Range:
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:Default: _diffusespec
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The filename pattern to probe for when detecting terrain specular maps (see 'auto use terrain specular maps')
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apply lighting to environment maps
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----------------------------------
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:Type: boolean
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:Range: True/False
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:Default: False
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Normally environment map reflections aren't affected by lighting, which makes environment-mapped (and thus bump-mapped objects) glow in the dark.
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Morrowind Code Patch includes an option to remedy that by doing environment-mapping before applying lighting, this is the equivalent of that option.
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Affected objects will use shaders.
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lighting method
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---------------
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:Type: string
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:Range: legacy|shaders compatibility|shaders
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:Default: default
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Sets the internal handling of light sources.
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'legacy' is restricted to 8 lights per object and emulates fixed function
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pipeline compatible lighting.
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'shaders compatibility' removes the light limit controllable through :ref:`max
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lights` and follows a modified attenuation formula which can drastically reduce
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light popping and seams. This mode also enables lighting on groundcover and a
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configurable light fade. It is recommended to use this with older hardware and a
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light limit closer to 8. Because of its wide range of compatibility it is set as
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the default.
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'shaders' carries all of the benefits that 'shaders compatibility' does, but
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uses a modern approach that allows for a higher :ref:`max lights` count with
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little to no performance penalties on modern hardware. It is recommended to use
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this mode when supported and where the GPU is not a bottleneck. On some weaker
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devices, using this mode along with :ref:`force per pixel lighting` can carry
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performance penalties.
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When enabled, groundcover lighting is forced to be vertex lighting, unless
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normal maps are provided. This is due to some groundcover mods using the Z-Up
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normals technique to avoid some common issues with shading. As a consequence,
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per pixel lighting would give undesirable results.
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Note that the rendering will act as if you have 'force shaders' option enabled
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when not set to 'legacy'. This means that shaders will be used to render all objects and
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the terrain.
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light bounds multiplier
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-----------------------
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:Type: float
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:Range: 0.0-5.0
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:Default: 1.65
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Controls the bounding sphere radius of point lights, which is used to determine
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if an object should receive lighting from a particular light source. Note, this
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has no direct effect on the overall illumination of lights. Larger multipliers
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will allow for smoother transitions of light sources, but may require an
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increase in :ref:`max lights` and thus carries a performance penalty. This
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especially helps with abrupt light popping with handheld light sources such as
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torches and lanterns.
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This setting has no effect if :ref:`lighting method` is 'legacy'.
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maximum light distance
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----------------------
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:Type: float
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:Range: The whole range of 32-bit floating point
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:Default: 8192
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The maximum distance from the camera that lights will be illuminated, applies to
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both interiors and exteriors. A lower distance will improve performance. Set
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this to a non-positive value to disable fading.
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This setting has no effect if :ref:`lighting method` is 'legacy'.
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light fade start
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----------------
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:Type: float
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:Range: 0.0-1.0
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:Default: 0.85
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The fraction of the maximum distance at which lights will begin to fade away.
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Tweaking it will make the transition proportionally more or less smooth.
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This setting has no effect if the :ref:`maximum light distance` is non-positive
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or :ref:`lighting method` is 'legacy'.
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max lights
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----------
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:Type: integer
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:Range: 2-64
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:Default: 8
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Sets the maximum number of lights that each object can receive lighting from.
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Increasing this too much can cause significant performance loss, especially if
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:ref:`lighting method` is not set to 'shaders' or :ref:`force per pixel
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lighting` is on.
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This setting has no effect if :ref:`lighting method` is 'legacy'.
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minimum interior brightness
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---------------------------
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:Type: float
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:Range: 0.0-1.0
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:Default: 0.08
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Sets the minimum interior ambient brightness for interior cells when
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:ref:`lighting method` is not 'legacy'. A consequence of the new lighting system
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is that interiors will sometimes be darker since light sources now have sensible
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fall-offs. A couple solutions are to either add more lights or increase their
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radii to compensate, but these require content changes. For best results it is
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recommended to set this to 0.0 to retain the colors that level designers
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intended. If brighter interiors are wanted, however, this setting should be
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increased. Note, it is advised to keep this number small (< 0.1) to avoid the
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aforementioned changes in visuals.
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This setting has no effect if :ref:`lighting method` is 'legacy'.
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antialias alpha test
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--------------------
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:Type: boolean
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:Range: True/False
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:Default: False
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Convert the alpha test (cutout/punchthrough alpha) to alpha-to-coverage when :ref:`antialiasing` is on.
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This allows MSAA to work with alpha-tested meshes, producing better-looking edges without pixelation.
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When MSAA is off, this setting will have no visible effect, but might have a performance cost.
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adjust coverage for alpha test
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------------------------------
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:Type: boolean
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:Range: True/False
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:Default: True
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Attempt to simulate coverage-preserving mipmaps in textures created without them which are used for alpha testing anyway.
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This will somewhat mitigate these objects appearing to shrink as they get further from the camera, but isn't perfect.
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Better results can be achieved by generating more appropriate mipmaps in the first place, but if this workaround is used with such textures, affected objects will appear to grow as they get further from the camera.
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It is recommended that mod authors specify how this setting should be set, and mod users follow their advice.
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soft particles
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--------------
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:Type: boolean
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:Range: True/False
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:Default: False
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Enables soft particles for particle effects. This technique softens the
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intersection between individual particles and other opaque geometry by blending
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between them. Note, this relies on overriding specific properties of particle
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systems that potentially differ from the source content, this setting may change
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the look of some particle systems.
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Note that the rendering will act as if you have 'force shaders' option enabled.
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This means that shaders will be used to render all objects and the terrain.
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weather particle occlusion
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--------------------------
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:Type: boolean
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:Range: True/False
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:Default: False
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Enables particle occlusion for rain and snow particle effects.
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When enabled, rain and snow will not clip through ceilings and overhangs.
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Currently this relies on an additional render pass, which may lead to a performance hit.
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.. warning::
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This is an experimental feature that may cause visual oddities, especially when using default rain settings.
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It is recommended to at least double the rain diameter through `openmw.cfg`.`
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