use the provided rendering as the base image use the additional reference image for the staircase material only this is a strict material edit only only change the visible surface material of the staircase steps do not change anything else in the image absolute rule treat the input image as a locked architectural photograph do not alter a single geometric edge contour height alignment object position or architectural element anywhere in the image only edit this area the visible stair treads the visible stair risers use the reference image as the direct material reference for the staircase steps apply the reference material only to the existing step surfaces match the color match the texture match the stone character match the surface grain match the realism match the natural stone appearance the staircase should read as solid stone block steps through material appearance only do not change the geometry of the steps in any way do not change camera position framing perspective composition lighting direction staircase geometry curved widening shape of the staircase number of steps step dimensions step height step depth step width terrace ramp stair cheeks side walls retaining walls railings garden path paving in front of the garage house garage bench vegetation planters furniture windows roof any object positions any levels any heights do not redesign anything reinterpret anything move anything rotate anything widen anything narrow anything raise anything lower anything change proportions change silhouettes add or remove elements realism increase realism only through the material rendering of the staircase steps improve only stone texture fidelity micro surface detail natural variation in the stone realistic surface shading realistic contact shadows on the step surfaces realistic stone edges do not use realism enhancement as a reason to alter geometry or any other part of the image final goal the final image must remain identical to the input image in every architectural and geometric aspect the only visible change should be that the staircase steps now have the exact material appearance of the reference image and look more realistic nothing else may change
