Transparent objects need to be drawn differently to opaque objects, since their color gets blended with the existing screen contents, with many possible blend modes.
Transparent objects are drawn after opaque objects in a back-to-front order, and alpha clipping can remove pixels based on alpha (transparency) values.
This quick-fire article will blast through ten effects, from inverted hull outlines and silhouettes to vertex displacement waves and 2D swirling vortices.
Alpha clipping along a dither pattern can approximate real transparency if viewed on a high-resolution screen, despite using opaque pixels.
