利用者:Maiself/Micropolygon Displacementのソースを表示

==Cycles Subdivision and Displacement==

Goal of this project is to enable artists to create highly detailed surfaces with less effort and resources compared to normal modeling techniques.

{{clr}}

{{Note|Note|This feature is under active development and should be considered experimental. Settings may be added and removed as development progresses; it is recommended to avoid use in production until things become more finalized.}}

[[File:Cycles_Displacement.jpg|center|thumb|900px|Cycles Subdivision & Displacement]]{{clr}}

=== Subdivision Rate ===

[[File:Geo2.png|left|thumb|900px|Global scene settings]]{{clr}}

* Render: Micropolygon size in pixels for the final render
* Viewport: Micropolygon size in pixels for the viewport render
* Offscreen Scale: Automatically reduces the amount of micropolygons outside of the "camera view" (higher values will produce less/larger micropolygons)
* Max Subdivisions:
* Dicing Camera:

[[{{ns:6}}:Subdivsionrate.jpg|left|thumb|600px|Subdivision Rate: 100, 50, 25, 12, 6, 3]]{{clr}}

[[{{ns:6}}:offscreenscale.jpg|left|thumb|600px|Offscreen Scale: 1, 4, 10, 20 (A different camera was used for dicing to show the effect better)]]{{clr}}


[[File:Geo1.png|left|thumb|900px|Object settings]]{{clr}}

* Adaptive: Enable/Disable Adaptive subdivision
* Dicing Scale: Multiplier for the scene dicing rate
* Final Dicing Rate: Final dicing values (Subdivision Rate * Dicing Scale)
* Subdivide UVs: Not supported at the moment

* Simple: The mesh is subdivided in a linear fashion, preserving its shape, this may be useful for example on walls in an architectural render.
* Catmull-Clark: This subdivision produces smoothed meshes, good for characters, organic models, or models designed for use with this type of subdivision.

[[File:Type.jpg|left|thumb|600px|Base Mesh, Simple, Catmull-Clark]]{{clr}}

=== Displacement Method ===

[[File:Dispme.png|left|thumb|900px|Displacement Method found in the material settings]]{{clr}}

* Bump Only:
* Displacement Only:
* Displacement and Bump

[[File:Method.png|left|thumb|600px|Bump Only, DIsplacement Only, Displacement and Bump]]{{clr}}

=== Displacement Nodes ===

* Space: World or Object
* Height:
* Midlevel:
* Scale: Multiplier for the strength of the displacement
* Normal:

[[File:scalar.jpg|left|thumb|200px|Displacement Node]]{{clr}}

* Space: Tangent, World or Object
* Vector:
* Midlevel:
* Scale: Multiplier for the strength of the displacement

[[File:vector_displacement_node.jpg|left|thumb|200px|Vector Displacement Node]]{{clr}}

* Displacement Output:

[[File:displacement_output.jpg|left|thumb|200px|Displacement Output]]{{clr}}
=== Mean Crease ===

[[File:Creasewiki.png|left|thumb|600px|Crease Setting]]{{clr}}

[[File:Crease_Values.png|left|thumb|600px|Edge with different crease values: Base Mesh, 0.0, 0.1, 0.2, 0.4, 0.6]]{{clr}}

=== Tips ===

* no abrupt changes in shader, use smoothstep or other smoothing functions instead
* prefer quad only meshes, use creases sparsely...
* formula to calculate the amount of polys with a rate < 1 -> 1/(dicing rate ^ 2)
* multiply the displacement input by 10 to get the correct result (2.78)

=== Geometry Cache ===

* Todo

=== Not Supported ===

* Subdivide UVs
* Instancing
* UV Tangent
* Deformation Motion Blur
* Deformation Motion Blur with displacement
* multiple materials on a single mesh will break the surface

=== Example Render ===

[[File:Goethe_Displacement.png|left|thumb|600px|Baked Displacement Map]]{{clr}}

[[File:Brick_Displacement.png|left|thumb|600px|Procedural Displacement]]{{clr}}

[[File:Cycles_2.78_subdivision_creases.png|left|thumb|600px|Base Mesh, Catmull-Clark, Catmull-Clark + Crease]]{{clr}}

[[File:Method.jpg|left|thumb|600px|Catmull-Clark, Bump, True, Both]]{{clr}}