![]() In some circumstances this can be confusing, especially so referencing external assets, tools or processes. In essence this is done by translating tonal information from an image specifically tasked for the job into transparency values – depending on the type of transparency being rendered, black equates to a surface rendered fully transparent, white fully opaque, grey being degrees of transparency or opacity in between.ĭesign note: the nomenclature used to describe transparency may differ depending on context, for example black values generally render fully or 100% transparent, which can also be referred to as being none or 0% opaque. In this context, creating materials that display some degree of image or object transparency, opacity maps, opacity masks, alpha masks, alpha maps et al are all functionally the same in that they provide Blenders node-based material system the data necessary to render transparency using separate instead of inclusive images ( i.e. There is some cross-over depending on context, especially when assembled and/or used outside Blender.ĭesign note: materials that make use of a separate image to define opacity/transparency should render without issue in both main Render Engines, Eevee and Cycles, but may be subject to other limiting factors contributing to a given material instance or engine used to render.Ī simple opacity map based transparent material assigned to a Cube rendered in the 3D View using Cycles (note absence of sort-order issues common to Eevee). They do differ generally in that ‘maps’ tend to comprise more detailed and graduated grey-scale tonal values, whereas ‘masks’ are typically more oblique, defined by simple black and white values only. Important: in this context, using a separate image to generate material transparency (technically ‘blending’), ‘ maps‘ and ‘ masks‘ are essentially the same, they result in variable transparency (or opacity) of materials. ![]() One such approach is to use an Opacity Map, a separate image that defines material transparency.ĭownload: Opacity Map defined Transparency example file *.blend (c.200 KB). ![]() Despite the removal of the Blender Render or Blender Internal rendering engine from Blender 2.8+, there are still a number of straightforward ways to create node-based transparent materials and/or transparent objects ( transparent surfaces).
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