revert: cloud raymarch LOD

README.md

@@ -303,8 +303,6 @@ Other main performance knobs:
 - `antialias: false`: disables MSAA.
 - `maxFps`: caps the animation loop.
 - `clouds.maxMarchUnits`: maximum cloud raymarch length.
-- Cloud raymarch uses 48 samples with distance-adaptive spacing: finer near
-  the camera, coarser toward the march limit.
 - `clouds.softEdges`, `edgeSoftness`, `horizonSoftness`: soft cloud edges;
   disabling `softEdges` restores the old hard shell behaviour.
 - `terrain.lod`: distance-dependent terrain mesh LOD; fine near the centre,