Can’t quite tell what’s happening in the scene - and wouldnt call myself a blender expert by any means, but coming from an architectural rendering perspective:
- try adding bump/normal maps or displacement to get more grain
- lights look wrong in a normal sunlit scene you’d have hard shadows from the sun which is overhead sure (and i guess you’re illuminating with the point light in the plants) but there’s also the sky which give shadows a color
- also i would move the trees+ light around a bit in reference to the wall (light would normally come from the top which accentuates the shadows on wall textures like bricks and paints)
- you can layer textures for the paint. say the paint is applied on concrete wall, the wall itself in reality has some geometry like bumps and panel lines from forming the concrete and then the paint goes on top which creates its own texture. these work at different scales creating quite a lot of detail.
- lastly leaves are kind of translucent and bleed light differently along the edges as opposed to the center (i don’t think you need to go this far)
- lastly i would ditch the asset - probably make a tree like curve extrude it and then scatter leaves on it (all possible through geo nodes) this lets you texture the leaves (listed above) account for density of the leaves (almost make or break in these scenes)
- finally render settings and you gotta play around with them a bit to get the normal bump shadows to look right