All images converted and resized with http://www.aconvert.com/image/

wood_texture.dds cropped (Total Textures - R2 Copyright 3DTotal.com)
wood_texture_specular.dds cropped (Total Textures - R2 Copyright 3DTotal.com)
bricks_diffuse.dds (Total Textures - R2 Copyright 3DTotal.com)
bricks_specular.dds (Total Textures - R2 Copyright 3DTotal.com)

Asphalt006_4K_Color.jpg, Planks007_4K_Color.jpg, Road006_4K_Color.jpg, stone.jpg  from ambientCG.com, licensed under CC0 1.0 Universal.
skybox images from https://opengameart.org/content/cloudy-skyboxes Creative Common: CC-BY 3.0