A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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questions relating to the usage of 360 degree HDRI lighting setups.
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an editor in Blender that gives you a 2D representation of all the data in the file as a list of hierarchies.
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Questions related to instancing. Instancing is used to duplicate many objects that are the same. Uses such as particles, Dupliverts.
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an open source language designed for creating materials, lights, etc. The ability to add custom OSL scripts for rendering with Cycles was added to blender in 2.65
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Questions related to memory consumption. This refers to both RAM (Random Access Memory) usage and hard drive space.
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Questions about converting different types of data to other types of data. Anything from file types to objects and values.
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a term use to refer to any effect that reduces sharpness in an image.
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Questions related to dimensions, size or scaling of objects, curves (Graph Editor), viewport, render, image, movie, ...
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a modifier and physics system introduced in Blender 2.6x that can turn objects into paint canvases and brushes, creating vertex colors, image sequences or displacement.
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questions about importing, exporting, or modifying files with the Scaleable Vector Graphics (SVG) file format
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the distance between the nearest and farthest objects in a scene that appear acceptably sharp when using a lens based camera, although the term is commonly used to simply refer…
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Questions pertaining to measurements in Blender. Real measurements as well as Blender units are acceptable.
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Questions considering the process of reduction of noise in final renders and/or texture baking.
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For use on questions asking how to optimize specific things. i.e. game logic, rigid body simulations, viewport performance.
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for questions about managing or linking to blocks of data within a .blend file. The base unit for any Blender project is the data-block. Examples of data-blocks include: meshes, objects, …
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generally used to read and write files. You can also use it to manage the entire file system and it also allows the internal structure of a .blend file to be browsed.
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Questions pertaining to the Blender GUI theme. Blender themes can be customized and exported in the User Preferences.
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a lightweight cross-browser JavaScript library/API used to create and display animated 3D computer graphics on a Web browser. Models created in Blender can be exported and loaded into thre…
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a framework for writing programs that execute across heterogeneous platforms consisting of central processing units (CPUs), graphics processing units (GPUs), digita…
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a tool for interactive 3D visualization on the Internet. It is a framework for publishing interactive 3D content to the web that does not require browser plug-ins and is authored using Bl…
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radial menus that display the menu's options around the mouse cursor.
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Questions about Blenders built in Ocean Simulation modifier. The Ocean Modifier is used to generate a series of images which are used to deform a mesh to emulate moving water.
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Questions relating to Blenders node editor. The node editor is used for non-destructive texture and material editing and for post-processing/compositing.
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a mathematical model representing a surface. Use this tag for any questions pertaining to the "Surface" Object type in blender.