message: enable up to 6 spot shadows
  This is a trivial change since we moved the lightspace computation
  in the fragment shader. The limitation to 6 is due to how we're storing
  the culling result.
diff: @@ -55,10 +55,9 @@ constexpr size_t CONFIG_MAX_LIGHT_COUNT = 256;
  constexpr size_t CONFIG_MAX_LIGHT_INDEX = CONFIG_MAX_LIGHT_COUNT - 1;
  // The maximum number of spot lights in a scene that can cast shadows.
  -// Light space coordinates are computed in the vertex shader and interpolated across fragments.
  -// Thus, each additional shadow-casting spot light adds 4 additional varying components. Higher
  -// values may cause the number of varyings to exceed the driver limit.
  -constexpr size_t CONFIG_MAX_SHADOW_CASTING_SPOTS = 2;
  +// There is currently a limit to 6 spot shadow due to how we store the culling result
  +// (see View.h).
  +constexpr size_t CONFIG_MAX_SHADOW_CASTING_SPOTS = 6;
  // The maximum number of shadow cascades that can be used for directional lights.
  constexpr size_t CONFIG_MAX_SHADOW_CASCADES = 4;
  