Gunzip files are just simple archives. A decent archive program like 7zip can open them.
You never said you were using Fabric, or OptiFabric, so that changes things a bit.
It seems that OptiFabric is reading files incorrectly compared to OptiFine (or changing some internal file logic in some way).
Code: Select all
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/dolphin.png, properties: optifine/mob/dolphin.properties
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/steve.png, variants: 10
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/iron_golem/iron_golem.png, variants: 2
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/enderman/enderman_eyes.png, variants: 3
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/ghast/ghast_shooting.png, variants: 5
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/ghast/ghast.png, variants: 5
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/slime/magmacube.png, properties: optifine/random/entity/slime/magmacube.properties
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/pig/pig.png, properties: optifine/random/entity/pig/pig.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/pig/pig2.png
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/silverfish.png, properties: optifine/random/entity/silverfish.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/silverfish2.png
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/squid.png, variants: 6
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/cow/cow.png, properties: optifine/random/entity/cow/cow.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/cow/cow2.png
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/zombie/zombie.png, properties: optifine/random/entity/zombie/zombie.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/zombie/zombie10.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/zombie/zombie2.png
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/zombie/drowned.png, properties: optifine/mob/zombie/drowned.properties
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/cat/cat_collar.png, properties: optifine/mob/cat/cat_collar.properties
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/illager/evoker.png, variants: 2
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/zombie_pigman.png, variants: 5
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/creeper/creeper.png, properties: optifine/random/entity/creeper/creeper.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/creeper/creeper5.png
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/skeleton/skeleton.png, properties: optifine/random/entity/skeleton/skeleton.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/skeleton/skeleton2.png
[14:56:35] [main/WARN]: [OptiFine] RandomEntities: Biome not found: IceMountains
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/wolf/wolf.png, properties: optifine/random/entity/wolf/wolf.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf2.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf2.png
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/wolf/wolf_angry.png, properties: optifine/random/entity/wolf/wolf.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_angry2.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_angry2.png
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/wolf/wolf_tame.png, properties: optifine/random/entity/wolf/wolf.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_tame2.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_tame2.png
[14:56:35] [main/INFO]: [OptiFine] RandomEntities: textures/entity/wolf/wolf_collar.png, properties: optifine/random/entity/wolf/wolf.properties
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_collar2.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_collar3.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_collar6.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_collar7.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_collar7.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_collar8.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_collar6.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_collar9.png
[14:56:35] [main/WARN]: [OptiFine] Texture not found: optifine/random/entity/wolf/wolf_collar2.png
This extract from the log shows what appears to be the attempt to load PureBDcraft RandomMob textures, but for some reason it's decided to try to look in "assets/minecraft/optifine/random/entity/[mob]/[variation]" instead of "/assets/minecraft/optifine/mob/[mob]/[variation]".
It would appear that another pack (likely the Vox pack), or mod, or whatever you're using is messing with RandomMobs, as there are a lot of other entries, too.
I don't really know what to tell you. Do you need Fabric? Does the pack work correctly without it?
If so, it's possibly an OptiFabric bug, if not it's possibly an issue with the Vox pack.