Update

3d_rendering.md

@@ -264,7 +264,7 @@ GPUs nowadays are no longer just focusing on graphics, but are kind of a general
 
 The important part of a system such as OpenGL is its **rendering [pipeline](pipeline.md)**. Pipeline is the "path" through which data go through during the rendering process. Each rendering system and even potentially each of its version may have a slightly different pipeline (but generally all mainstream pipelines somehow achieve rasterizing triangles, the difference is in details of how they achieve it). The pipeline consists of **stages** that follow one after another (e.g. the mentioned mapping of vertices and drawing of triangles constitute separate stages). A very important fact is that some (not all) of these stages are programmable with so called **[shaders](shader.md)**. A shader is a program written in a special language (e.g. [GLSL](glsl.md) for OpenGL) running on the GPU that processes the data in some stage of the pipeline (therefore we distinguish different types of shaders based on at which part of the pipeline they reside). In early GPUs stages were not programmable but they became so as to give a greater flexibility -- shaders allow us to implement all kinds of effects that would otherwise be impossible.
 
-Let's see what a typical pipeline might look like, similarly to something we might see e.g. in OpenGL. We normally simulate such a pipeline also in [software renderers](sw_rendering.md). Note that the details such as the coordinate system [handedness](handedness.md) and presence, order, naming or programmability of different stages will differ in any particular pipeline, this is just one possible scenario:
+To touch on something practical let's see what a typical pipeline might look like, similarly to something we might encounter e.g. in OpenGL. We normally simulate such a pipeline also in [software renderers](sw_rendering.md). Note that the details such as the coordinate system [handedness](handedness.md) and presence, order, naming or programmability of different stages will differ in any particular pipeline, this is just one possible scenario:
 
 1. Vertex data (e.g. 3D [model space](model_space.md) coordinates of triangle vertices of a 3D model) are taken from a vertex buffer (a GPU memory to which the data have been uploaded).
 2. **Stage: [vertex shader](vertex_shader.md)**: Each vertex is processed with a vertex shader, i.e. one vertex goes into the shader and one vertex (processed) goes out. Here the shader typically maps the vertex 3D coordinates to the screen 2D coordinates (or [normalized device coordinates](ndc.md)) by: