MRT

Writing to several output images at once in a single rendering pass.

Multiple Render Targets lets a fragment shader output more than one value per pixel — say color in one image, surface normals in another, depth or material data in a third — all in one pass. This is the foundation of techniques like deferred shading, where the scene's geometry is captured into several buffers first and lit afterward. It avoids re-drawing the whole scene once per piece of data.