- raise limits to 24G, since this version uses up to 22,6G on TW 
  for build (16,7G on 15.2)

- update to version 3.11.0
  + Round linear curves now automatically check for the existence
    of left and right
  + connected segments if the flags buffer is empty. Left segments
    exist if the
  + segment(id-1) + 1 == segment(id) and similarly for right
    segments.
  + Implemented the min-width feature for curves and points, which
    allows to increase the
  + radius in a distance dependent way, such that the curve or
    points thickness is n pixels wide.
  + Round linear curves are closed now also at their start.
  + Embree no longer supports Visual Studio 2013 starting with this
    release.
  + Bugfix in subdivision tessellation level assignment for non-
    quad base primitives
  + Small meshes are directly added to top level build phase of
    two-level builder to reduce memory consumption.
  + Enabled fast two level builder for user geometries when low
    quality build is requested.
- update to version 3.10.0
  + Added EMBREE_COMPACT_POLYS CMake option which enables double
    indexed triangle and quad
  + leaves to reduce memory consumption in compact mode by an
    additional 40% at about
  + 15% performance impact. This new mode is disabled by default.
  + Compile fix for oneTBB 2021.1-beta05

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baserev update by copy to link target

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- Use memory limit as the build is dominated by 2 huge gas runs.

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baserev update by copy to link target

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- update to version 3.8.0
  + New Features:
    * Added collision detection support for user geometries (see
      rtcCollide API function)
    * Passing geomID to user geometry callbacks.
  + Fixed Issues:
    * Bugfix in AVX512VL codepath for rtcIntersect1
    * For sphere geometries the intersection filter gets now
      invoked for front and back hit.
    * Fixed some bugs for quaternion motion blur.
    * RTCIntersectContext always non-const in Embree API
    * Made RTCHit aligned to 16 bytes in Embree API
- update to version 3.7.0
  + Added quaternion motion blur for correct interpolation of
    rotational transformations.
  + Fixed wrong bounding calculations when a motion blurred
    instance did instantiate a motion blurred scene.
  + In robust mode the depth test consistently uses tnear <= t <=
    tfar now in order to robustly continue traversal at a previous
    hit point in a way that guarentees reaching all hits, even hits
    at the same place.
  + Fixed depth test in robust mode to be precise at tnear and
    tfar.
  + Added next_hit tutorial to demonstrate robustly collecting all
    hits along a ray using multiple ray queries.
  + Implemented robust mode for curves. This has a small
    performance impact but fixes bounding problems with flat
    curves.
  + Improved quality of motion blur BVH by using linear bounds
    during binning.

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baserev update by copy to link target

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- update to version 3.6.1
   Added Catmull-Rom curve types.
   Added support for multi-level instancing.
   Added support for point queries.
   Fixed a bug preventing normal oriented curves being used unless timesteps were specified.
   Fixed bug in external BVH builder when configured for dynamic build.
   Added support for new config flag "user_threads=N" to device initialization
   which sets the number of threads used by TBB but created by the user.
   Fixed automatic vertex buffer padding when using rtcSetNewGeometry API function.

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baserev update by copy to link target

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initialized devel package after accepting 729433

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- Trim marketing from description.

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Sanitize _constraints

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Take two of embree submission, addressing Stefans comments
here as well.

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