The contents of this folder were built using cmgen as follows:
export CMGEN=../../out/cmake-release/tools/cmgen/cmgen
$CMGEN -x . --format=ktx --size=256 --extract-blur=0.1 ../../assets/environments/white_furnace/white_furnace.exr
$CMGEN -x . --format=ktx --size=256 --extract-blur=0.1 ../../third_party/environments/venetian_crossroads_2k.hdr
$CMGEN -x . --format=ktx --size=256 --extract-blur=0.1 ../../third_party/environments/pillars_2k.hdr
$CMGEN -x s3tc --format=ktx --size=256 --extract-blur=0.1 --compression=s3tc_rgba_dxt5 ../../third_party/environments/venetian_crossroads_2k.hdr
mv s3tc/venetian_crossroads_2k/venetian_crossroads_2k_ibl.ktx venetian_crossroads/venetian_crossroads_ibl_s3tc.ktx
mv s3tc/venetian_crossroads_2k/venetian_crossroads_2k_skybox.ktx venetian_crossroads/venetian_crossroads_skybox_s3tc.ktx
rm -rf s3tc