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TouchDesigner MCP Server v2.8.0 - 21 MCP tools, 629 operators with clean parameter data, 69 Python API classes, 14 tutorials, 32 workflow patterns. Includes version system, experimental techniques KB, core tool enhancements, and experimental build support
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{
"id": "trail_sop",
"name": "Trail SOP",
"displayName": "Trail SOP",
"category": "SOP",
"subcategory": "Generators",
"version": "",
"lastUpdated": "2025-08-07T07:50:11.321Z",
"sourceFile": "C:\\Program Files\\Derivative\\TouchDesigner\\Samples\\Learn\\OfflineHelp\\https.docs.derivative.ca\\Trail_SOP.htm",
"url": "",
"description": "The Trail SOP takes an input SOP and makes a trail of each point of the input SOP over the past several frames, and connects the trails in different ways. It will generate trails of any input geometry, whether it is a cube translating, a deforming surface, or particles. This is useful for multi-frame ghosting effects and temporal modelling.",
"summary": "The Trail SOP takes an input SOP and makes a trail of each point of the input SOP over the past several frames, and connects the trails in different ways. It will generate trails of any input geometry",
"details": "",
"usage": "",
"tips": [],
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"description": "preserve - Preserves the original geometry. mesh - Connects the resulting points as a mesh. poly - Connects the resulting points as polygons. velocity - As the points move faster, corresponding velocity attributes are computed.",
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{
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"name": "Trail Length",
"label": "Trail Length",
"group": "General",
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"description": "length - This sets the length of the trail by establishing the maximum number of frames for the Trail to use, i.e. a of 25will connect the geometry from the previous twenty-five frames.",
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{
"id": null,
"name": "Trail Increment",
"label": "Trail Increment",
"group": "General",
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"description": "inc - This will skip the given number of frames to build a trail with fewer points in it, but the same length. This will lower the resolution of the trail by reducing the number of points in the trail. This is better for ghosting when using . If you set the Increment to 2 or more, you will see the same length trail, but fewer copies of the geometry.",
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"name": "Cache Size",
"label": "Cache Size",
"group": "General",
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"description": "cache - The number of frames to keep cached in available memory.",
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"name": "Evaluate Within Frame Range",
"label": "Evaluate Within Frame Range",
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"description": "evalframe - This option specifies that the Trail will only evaluate, or cook, within the current frame range ($FSTART, $FEND). If this option is not enabled, the can evaluate prior to the start frame.",
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"name": "Connectivity",
"label": "Connectivity",
"group": "General",
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"description": "surftype - - This option is used to select the type of surface, when using a .\n\n rows - Creates horizontal lines. cols - Creates vertical lines. rowcol - Both Rows and Columns. Looks like Quads in wire frame display, but all polygons are open (if the primitive type is polygon). triangles - Build the grid with Triangles. quads - Generates sides composed of quadrilaterals (default). alttriangles - Generates triangles that are opposed; similar to the option.",
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"description": "rows - Creates horizontal lines. cols - Creates vertical lines. rowcol - Both Rows and Columns. Looks like Quads in wire frame display, but all polygons are open (if the primitive type is polygon). triangles - Build the grid with Triangles. quads - Generates sides composed of quadrilaterals (default). alttriangles - Generates triangles that are opposed; similar to the option.",
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"name": "Close Rows",
"label": "Close Rows",
"group": "General",
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"description": "close - When selected, closes the rows in the output selection.",
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"description": "velscale - Scales the velocity by a specific value when is selected.",
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"name": "Reset",
"label": "Reset",
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