  ------
  Music
  ------

anthem_intro.ogg
anthem_loop.ogg
  excerpt of Anthem by Adhesive Wombat
  Check out their music at soundcloud.com/adhesivewombat
  Excerpts licensed under CC BY-NC-SA 4.0
  (Made and licensed with permission)

TeddyBearWaltz.ogg
  Teddy Bear Waltz - Kevin MacLeod (incompetech.com)
  Licensed under Creative Commons: By Attribution 3.0 License
  http://creativecommons.org/licenses/by/3.0/

  (Trimmed, amplified and compressed, derivative under same license and attribution)

drums.ogg
  This is is derived from `dialog-question.wav`,   https://packages.ubuntu.com/xenial/ubuntu-sounds
  The original sound was composed and recorded by Nathaniel McCallum <npmccallum@canonical.com>. It appears to be released under Creative Commons Attribution-ShareAlike 2.0.
  The version used is a derivative (pitch-shifted, reverberated, bass-boosted, amplified and made stereo, if I remember correctly) released under Creative Commons Attribution-ShareAlike 4.0 International.

empty.ogg
  Original - CC-Zero Public Domain


  -----------------------
  tracks/starship textures
  -----------------------

base1c.jpg
basictrim1a.jpg
ribs1a.jpg
trim4b.jpg
wall1b.jpg
  By Georges "TRaK" Grondin
  drognin@gmail.com
  http://www.mercenariesguild.net/trak/
  MIT license

  ---

bomber_metal1b.jpg
brushedbarrel.jpg
cromwatertower2.jpg
  golgotha_useful
  from Crack.com, Submitted to http://opengameart.org by bart
  CC0

  ---

marsrobot5.jpg
  Derived from tracks/xr by STK Enterprise creator, "dual-licensed under both GPL and CC-BY-SA"

  ---

metal_rusted.jpg
  Derived from tracks/mines by STK Enterprise creator, CC BY-SA 3.0

  ---

trak3_base1.png
trak3_light1a.png
trak3_panel3d.png
  By Georges "TRaK" Grondin
  drognin@gmail.com
  http://www.mercenariesguild.net/trak/
  GPL


  -----------------------------
  Other STK models and textures
  -----------------------------
crate.png (tracks/hacienda)
  by Luke.RUSTLTD
  released under public domain
  http://opengameart.org/content/3-crate-textures-w-bump-normal

transparence.png (tracks/snowmountain)
tree.spm (tracks/snowmountain)
  (could not find license for these 2)

stklib_blueRadioTower_a_main.spm
stklib_pallet_a.spm
stklib_woodLodge_a_main.spm
stklib_woodLodge_a_main_limit.spm
stk_generic_gridA.png (aka stk_generic_gridA_zipper.png)
  (could not find license for these 5)


  -----
  Other
  -----

guardrail.jpg
guardrail_snow.jpg
  From https://www.outworldz.com/cgi/free-seamless-textures.plx (https://www.outworldz.com/SeamlessTextures/master/Road/guardrail.jpg) - "This content is licensed CC-Zero Public Domain."

icecream_strawberry.png
icecream_vanilla.png
  Theses are derivates of `stktex_generic_WoodB.png`. Couldn't figure out license of original, keep derivatives under same license.

no_line-stktex_generic_roadSnow_a.png
  This is a derivative of `stktex_generic_roadSnow_a.png`. Couldn't figure out license of original, keep derivatives under same license.

frozen-drive_track.spm
quads.xml
scene.xml
scripting.as
track.xml
  Original - CC BY-SA 4.0 International (attr. "GumballForAPenny")

black.png
Cube.spm
graph.xml
materials.xml
portal_blue.png
screenshot.jpg
SomeModel.spm
transparent-to-black-gradient.png
TunnelReverseBlock.spm
  Original - CC-Zero Public Domain, attribution appreciated.


Portal technology developed by Maj. Dr. Andedonia J. Ghastly

