Contents
What is alpha testing in graphics?
Alpha test is an old technique used in computer graphics. The idea behind it is very simple. In a very basic form, a material (shader) of a rendered object can discard processed pixels based on the alpha channel of RGBA texture.
Is stencil buffer useful?
In the simplest case, the stencil buffer is used to limit the area of rendering (stenciling). Other rendering techniques, such as portal rendering, use the stencil buffer in other ways; for example, it can be used to find the area of the screen obscured by a portal and re-render those pixels correctly.
What is Alpha cutoff unity?
The Alpha Clipping option controls whether your Material acts as a Cutout Shader or not. Enable Alpha Clipping to create a transparent effect with hard edges between the opaque and transparent areas. HDRP achieves this effect by not rendering pixels with alpha values below the value you specify in the Threshold field.
How can I test my graphics pipeline performance?
As you can see, much of the ROP workload taxes the available frame-buffer bandwidth. The best way to test if your application is frame-buffer-bandwidth bound is to vary the bit depths of the color or the depth buffers, or both.
What do you need to know about the rendering pipeline?
Rendering Pipeline Overview. The Rendering Pipeline is the sequence of steps that OpenGL takes when rendering objects. This overview will provide a high-level description of the steps in the pipeline.
When does the OpenGL rendering pipeline begin and end?
The OpenGL rendering pipeline is initiated when you perform a rendering operation. Rendering operations require the presence of a properly-defined vertex array object and a linked Program Object or Program Pipeline Object which provides the shaders for the programmable pipeline stages. Once initiated, the pipeline operates in the following order:
Which is the back end of the graphics pipeline?
The very back end of the pipeline, raster operations (often called the ROP), is responsible for reading and writing depth and stencil, doing the depth and stencil comparisons, reading and writing color, and doing alpha blending and testing. As you can see, much of the ROP workload taxes the available frame-buffer bandwidth.