Tip: do not spawn Burnside Special before/after spawning this because it will completly destroy textures and models
What do you mean? When i was looking at your mod, i didnt load Burnside Special before loading your mod But if you say if i loaded Burnside Special in general - do you think i need to go clear cache only to load your mod!? Seriously??? That is some big bug, so get your hands ready and get to fixing it.
No clearing cache needed just restart the game if you spawned burnside special, if you didn't spawn it then i don't know what happened because for me it works alright
My guess is that there are some bugs with shadows, that make textures extremely dark, maybe it will help you