title: three.js How to render a simple white dot/point/pixel
body: <p>I'm using THREE.WebGLRenderer and I would like to draw a few same-sized white dots at specific positions in 3D space.</p>
  
  <p>Should I use sprites, calculate the 2D screen coordinates and use SpriteMaterial.useScreenCoordinate?</p>
  
  <p>Should I simply recalculate the size of the sprites using the distance of them to the camera?</p>
  
  <p>Can I use SpriteMaterial.scaleByViewport or SpriteMaterial.sizeAttenuation? Is there any documentation for this?</p>
  
  <p>Is there something like GL_POINTS? It would be nice to just define 1 vertex and get a colored pixel at that position. Should I experiment with PointCloud?</p>
  
  <p>Thanks for any hints!</p>
  
  <p>Edit: All points should have the same size on the <em>screen</em>.</p>