High Quality Content by WIKIPEDIA articles! Unified Shader Model term is used to describe two similar but separate concepts: Unified Shading Architecture and Unified Shader Model. The Unified Shader Model (known in OpenGL as simply "Unified Shader Model", known in Direct3D 10 as "Shader Model 4.0"), uses a consistent instruction set across all shader types . All shader types have almost the same capabilities - they can read from textures, data buffers and perform the same set of arithmetic instructions. However, the instruction set is not completely the same between different shader types - for example, only the pixel shader can read textures with implicit coordinate gradients; only the geometry shader can emit extra rendering primitives and so on .

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