MADE WITH THANKS

Credits & licenses

Material Drop is developed by FiM with Unity and the Google Mobile Ads SDK. Audio and font acknowledgments are reproduced below. Some artwork and the short all-clear voice cue were generated with AI during production; gameplay screenshots on this site are actual development captures. Promotional art is illustrative.

Third-party assets remain subject to their respective licenses. A reference to a physics publication does not mean the authors' code or publication is included in the game.

Google Mobile Ads: official SDK. Unity: legal notices. Questions: geon.fim@gmail.com.

Copyright (c) 2011 Juan Montoreano (juan@remolacha.biz), 
with Reserved Font Name Lilita

This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL


-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------

PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font creation
efforts of academic and linguistic communities, and to provide a free and
open framework in which fonts may be shared and improved in partnership
with others.

The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded, 
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply
to any document created using the fonts or their derivatives.

DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.

"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).

"Original Version" refers to the collection of Font Software components as
distributed by the Copyright Holder(s).

"Modified Version" refers to any derivative made by adding to, deleting,
or substituting -- in part or in whole -- any of the components of the
Original Version, by changing formats or by porting the Font Software to a
new environment.

"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.

PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed, modify,
redistribute, and sell modified and unmodified copies of the Font
Software, subject to the following conditions:

1) Neither the Font Software nor any of its individual components,
in Original or Modified Versions, may be sold by itself.

2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.

3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the corresponding
Copyright Holder. This restriction only applies to the primary font name as
presented to the users.

4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.

5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created
using the Font Software.

TERMINATION
This license becomes null and void if any of the above conditions are
not met.

DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.

This Font Software is licensed under the SIL Open Font License,
Version 1.1.

This license is copied below, and is also available with a FAQ at:
http://scripts.sil.org/OFL

-----------------------------------------------------------
SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
-----------------------------------------------------------

PREAMBLE
The goals of the Open Font License (OFL) are to stimulate worldwide
development of collaborative font projects, to support the font
creation efforts of academic and linguistic communities, and to
provide a free and open framework in which fonts may be shared and
improved in partnership with others.

The OFL allows the licensed fonts to be used, studied, modified and
redistributed freely as long as they are not sold by themselves. The
fonts, including any derivative works, can be bundled, embedded,
redistributed and/or sold with any software provided that any reserved
names are not used by derivative works. The fonts and derivatives,
however, cannot be released under any other type of license. The
requirement for fonts to remain under this license does not apply to
any document created using the fonts or their derivatives.

DEFINITIONS
"Font Software" refers to the set of files released by the Copyright
Holder(s) under this license and clearly marked as such. This may
include source files, build scripts and documentation.

"Reserved Font Name" refers to any names specified as such after the
copyright statement(s).

"Original Version" refers to the collection of Font Software
components as distributed by the Copyright Holder(s).

"Modified Version" refers to any derivative made by adding to,
deleting, or substituting -- in part or in whole -- any of the
components of the Original Version, by changing formats or by porting
the Font Software to a new environment.

"Author" refers to any designer, engineer, programmer, technical
writer or other person who contributed to the Font Software.

PERMISSION & CONDITIONS
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Font Software, to use, study, copy, merge, embed,
modify, redistribute, and sell modified and unmodified copies of the
Font Software, subject to the following conditions:

1) Neither the Font Software nor any of its individual components, in
Original or Modified Versions, may be sold by itself.

2) Original or Modified Versions of the Font Software may be bundled,
redistributed and/or sold with any software, provided that each copy
contains the above copyright notice and this license. These can be
included either as stand-alone text files, human-readable headers or
in the appropriate machine-readable metadata fields within text or
binary files as long as those fields can be easily viewed by the user.

3) No Modified Version of the Font Software may use the Reserved Font
Name(s) unless explicit written permission is granted by the
corresponding Copyright Holder. This restriction only applies to the
primary font name as presented to the users.

4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
Software shall not be used to promote, endorse or advertise any
Modified Version, except to acknowledge the contribution(s) of the
Copyright Holder(s) and the Author(s) or with their explicit written
permission.

5) The Font Software, modified or unmodified, in part or in whole,
must be distributed entirely under this license, and must not be
distributed under any other license. The requirement for fonts to
remain under this license does not apply to any document created using
the Font Software.

TERMINATION
This license becomes null and void if any of the above conditions are
not met.

DISCLAIMER
THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
OTHER DEALINGS IN THE FONT SOFTWARE.

	

	Impact Sounds (1.0)

	Created/distributed by Kenney (www.kenney.nl)
	Creation date: 19-12-2019

			------------------------------

	License: (Creative Commons Zero, CC0)
	http://creativecommons.org/publicdomain/zero/1.0/

	This content is free to use in personal, educational and commercial projects.

	Support us by crediting Kenney or www.kenney.nl (this is not mandatory)

			------------------------------

	Donate:   http://support.kenney.nl
	Request:  http://request.kenney.nl
	Patreon:  http://patreon.com/kenney/

	Follow on Twitter for updates:
	http://twitter.com/KenneyNL

Material Drop 0.4 audio sources

SandFlow.mp3: "pouring Sand and salt", Sounds For Earthquakes,
published by Happy Soul Music Library under CC0.
Source and commercial-use permission:
https://happysoulmusic.com/audio/sounds-for-earthquakes-pouring-sand-and-salt-2-mp3/
Source URL: https://happysoulmusic.com/wp-content/grand-media/audio/sounds-for-earthquakes-pouring-sand-and-salt-2.mp3

slime_01..16.ogg, splash_01..15.ogg, bubble_01..03.ogg,
loop_water_01..03.ogg, loop_bubbles_1/02.ogg, loop_rain.ogg:
rubberduck, "40 CC0 water / splash / slime SFX", 2018, CC0.
Author states that some slime samples are recordings of real slime.
https://opengameart.org/content/40-cc0-water-splash-slime-sfx
https://opengameart.org/sites/default/files/water-splash-slime-sfx.zip

Kenney impact sounds: CC0; see Kenney/License.txt.

0.9.4 additional physical sand takes (mariethompson, CC0-1.0):
https://freesound.org/people/mariethompson/sounds/516923/ - scrabble and soft sand pour
https://freesound.org/people/mariethompson/sounds/516921/ - pouring sand and salt 1
https://freesound.org/people/mariethompson/sounds/516919/ - pouring sand and salt 3 spiraling
Public HQ MP3 previews were decoded once and cut into eight 0.86-second
SandLanding_00..07.wav assets; mixed with Kenney CC0 soft impacts.
No non-commercial license, account session or paid subscription was used.
QA/audio-variant-assets.json records each exact source/cut.
Additional Kenney impactWood_light/heavy and impactSoft_heavy recordings
come from the same official CC0 Impact Sounds 1.0 archive.

The hourglass recording by botha9johann (Freesound 326707) is NOT
included: the publisher currently labels it CC BY-NC, regardless of
third-party search metadata claiming CC0. It cannot ship in an ad-funded game.

Material Drop material Foley candidates (20 independent recordings)

Author/publisher: Jason Steele / FilmCow
https://filmcow.itch.io/filmcow-sfx
https://filmcow.itch.io/filmcow-sfx-3

Audio/ASMR/Sand01..05: Beads & Sand, sand hit ground 2, sand falling 4,
sand pouring 2, sand soft grinding 3, sand scooped in hand 3.
Audio/ASMR/Jelly01..05: Slime, slime hit soft 1, slime movement 1,
slime movement 3, slime movement 8, slime membrane 4.
Audio/ASMR/Water01..05: Recorded SFX, water splashing small 1, 5, 13,
water pouring into glass 2, water moving through 3.
Audio/ASMR/WaxProxy01..05: Ice, ice crack 7, 12, 28, 37, 39.

IMPORTANT: WaxProxy sounds are real ICE recordings, not real wax recordings.
They are provisional brittle-shell Foley for audition. No sound was extracted
from ASMR videos, competitor games, streaming services, or unlicensed previews.
Each asset file is copied from the publisher's original 48kHz WAV unchanged.
Runtime playback uses level-only peak gain (at most 4x, target 0.5 peak); no
filter, pitch synthesis, transient layering or cutting of the full source tail.
Sand/water movement loops use a 20ms loop seam. Private audition strips only
adjust gain and insert 450ms between takes.

FilmCow custom royalty-free license, NOT CC0. Personal and commercial game
use permitted under the complete publisher agreement. No claiming authorship
or resale of standalone sound files. Excludes national government and law
enforcement projects and SPLC/CAHN categorized hate-group projects.
The complete agreement is retained at QA/AudioReferences/FilmCow-license.pdf.
This notice records provenance; it does not replace the publisher's terms.

Held interaction recordings - Material Drop v0.10.7

Publisher / author: FilmCow / Jason Steele
Source: https://filmcow.itch.io/filmcow-sfx-3
Libraries: FilmCow SFX - Beads & Sand / FilmCow SFX - Slime
HeldSandPour.wav <- sand pouring 2.wav
HeldJellySquish01.wav <- slime movement 2.wav
HeldJellySquish02.wav <- slime movement 1.wav
HeldJellySquish03.wav <- slime movement 3.wav

Original recordings copied unchanged. Runtime sand loop uses only a 20 ms
seam crossfade. Jelly takes are unfiltered original recordings, shuffled in
an independent held-feedback bag. Motion envelopes affect playback volume.
Held water now uses FilmCow water moving through 3, with a 20ms loop seam.
Material landing/flow banks are replaced by the 20 ASMR candidates described
in ASMR-Candidates-NOTICE.txt. Combo/game-over/all-clear cues are unchanged.

FilmCow custom royalty-free license, NOT CC0:
Worldwide, non-exclusive, perpetual use under its terms, including games,
mobile apps and commercial projects. No claiming authorship or resale of
the sound files. Not permitted in national government/law enforcement
projects or projects produced by SPLC/CAHN categorized hate groups.
Keep and comply with the complete agreement in QA/AudioReferences/FilmCow-license.pdf.
This notice is provenance, not a replacement for the publisher agreement.

AllClearVoice.wav is a generated generic English synthetic arcade announcer
saying "ALL!!! CLEAR!!!". This is an interim English cue, not a purchased
human voice asset or a claim of an approved final performance.
It is not a human recording, celebrity imitation or uploaded voice clone.

Generated at authoring time with Qwen3-TTS-12Hz-1.7B-CustomVoice (Ryan) through the
official public Qwen demo. Only the cue text and an original voice description
were submitted, anonymously; no uploaded voice sample or account credentials.
No TTS model, runtime inference or network API ships in the Unity player.
Only the short mastered PCM WAV is included.

Model: Apache-2.0
https://huggingface.co/Qwen/Qwen3-TTS-12Hz-1.7B-CustomVoice
https://github.com/QwenLM/Qwen3-TTS
https://huggingface.co/spaces/Qwen/Qwen3-TTS

The earlier calm Kokoro take was rejected by the user and is not the shipped cue.

Original generation parameters: QA/AllClear-Auditions/02-arcade-male.json
Packaged-cue provenance: QA/AudioReferences/AllClear-English-provenance.json
The archived Korean take is not the currently packaged game cue.
The original filename/meta GUID is retained for Unity resource compatibility.

Poly Haven assets imported for Material Drop.
License: CC0 1.0 Universal (public domain dedication).
Asset license: https://polyhaven.com/license
License text: https://creativecommons.org/publicdomain/zero/1.0/legalcode

Sand 03 by Charlotte Baglioni:
https://polyhaven.com/a/sand_03
1K albedo, OpenGL normal, roughness and displacement maps.

Dense Sand:
https://polyhaven.com/a/dense_sand
1K diffuse, OpenGL normal, roughness and displacement maps.
Preserved material experiment/reference. Current sand piles and falling previews
use angular coloured specks with flat pigment coverage, not scanned pile shading.

Studio Small 09 HDRI:
https://polyhaven.com/a/studio_small_09
1K HDR studio environment used for real material reflections.

These are material/environment assets, not a third-party falling-sand physics
engine. Sandtrix is consulted as an interaction reference only; no proprietary
game code, art or recordings are copied from it.