Orthographic camera and small/big objects

[martinRenou]

Currently the near and far of the orthographic camera are kept to the default values, respectively 0.1 and 2000. This means that the orthographic camera will have troubles showing objects smaller than 0.1 and bigger than 2000.

There was an attempt to use the same near and far as the perspective camera (More context in #510) but that does not seem to work. I suspect it's because the orthographic camera does not support the logarithmic depth buffer.

We should either look into how to make it work with the logarithmic depth buffer, or look into using a near and far that makes sense depending on our computed refLength

[martinRenou]

Note that this should have been fixed already in ThreeJS mrdoob/three.js#17442