edit the supplied image by changing only the wood stain colour of all four existing bowls to deep black apply the same neutral black wood stain to all four pieces replace all existing colours completely the finish should read clearly as black without blue purple green or brown colour casts use a translucent black wood stain that keeps the exact original oak grain patterns grain direction pores surface texture and subtle milling traces clearly visible preserve each bowl s individual grain character maintain subtle variations between black and charcoal within the grain so the surfaces remain readable and do not become flat featureless black apply the stain consistently across each entire piece top surface recessed interior and visible sides all four bowls must have the same stain intensity with natural variation caused only by their individual wood grain and the existing lighting preserve all original geometry dimensions thickness recess shapes positions gaps camera angle framing background lighting and shadows keep the existing seams clearly visible so the arrangement still reads as four separate bowls retain the original fully matte finely sanded finish no opaque paint glossy varnish plastic appearance or replacement wood textures do not move resize reshape merge or add objects no text or labels the final image must look like the exact same photograph of the same four oak bowls with only their finish changed to uniform matte black wood stain and the natural oak texture still clearly visible
