DAng! Thank u for Help De Thats very helpful informtion.. I very much appreciate you for taking the time to help me.!

i like the tree, the grass is just horribly noisy in comparison to the tree

a) Learn different textures. Right now, every single material you draw consists of different-colored rectangles. Leaves, grass, rock, all look the same. Same color progression, same gloss. Look up photographs and paintings and notice that different materials reflect light in various ways.

b) Apply differing contrasts to your ramps. Floor should have low contrast, and three-dimensional objects (such as the tree) should have high contrast. Otherwise there's no illusion of depth and your picture ends up looking flat and messy.

c) Don't be afraid of flat, non-textured areas, especially across shaded parts of the objects.

Imo i think the tree trunk is fine except you want to make it stand out more because it blends in with the grass. And yes as the other comments said the grass and tree leaves are too closely related. Overall nice work.

I feel like the grass would be great for a really grassy and weedy area, but otherwise like others have said, it's too much.

Ok thank u guys for help.. I tried make the tree leafes much smaller and added more contrast..

It's not necessarily variety you need, the whole grass texture needs to be distinct from the tree leaf texture. You would need to use differently shaped/sized clusters (though having a similar one here and there should be fine).

I don't necessarily think you should put in more grass variety - the grass texture itself looks very nice. The real problem here is that the leaf texture is the same size as the grass texture. The pixel clusters for the leaves should be larger than the pixel clusters for the blades of grass. Just keep everything in scale!

Also: contrast.

So that why it looks like invisible.. I should put more grass variety..

the grass texture is too loud and too similar to the leaves imo. If you put the image in grayscale the tree practically becomes invisible