honestly what you could do to style the textures is just do the valve method of using the photoshop "cutout" filter. valve did this with several textures in TF2---the blood decals are just the HL2 decals that were put through the cutout filter and were recolored. the water cooler in spawnrooms are the same situation---it was an unused HL2 prop that was given a really quick makeover with that texture.

it'd probably be annoying to do that for ever single texture here but it'd be better than just using AI. AI bad