many worldgen mods and gonna try technic now

mods/dfcaverns/ice_sprites/README.txt

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+Minetest Game mod: ice_sprites
+============================
+Adds ice sprites, which can then be caught in a net (via the fireflies mod) and placed in bottles to provide light (via the vessels mod).
+
+Authors of source code
+----------------------
+Shara RedCat (MIT)
+
+Authors of media (textures)
+---------------------------
+Shara RedCat (CC BY-SA 3.0):
+  fireflies_firefly.png
+  fireflies_firefly_animated.png
+  fireflies_bottle.png
+  fireflies_bottle_animated.png
+
+fireflies_bottle.png and fireflies_bottle_animated.png are
+modified from a texture by Vanessa Ezekowitz (CC BY-SA 3.0)
+
+converted to ice_sprite textures by FaceDeer, who simply changed the yellow dots to blue.