dither less. the text is bad, I'll just crit the image part.

the lighting is a bit off. The highlight implies it's just barely on the side of the rock opposite us, while the shadow (which is too light by the way, use more contrast, you don't have any darks in your palette) er, while the shadow indicates the light source is closer to us. fix this by letting the shadow get its fair space, instead of just hugging the edge. the rock is also a pretty featureless lump, nothing particularly rock-like about it. instead of one smooth mound, try giving it different faces, sharper edges as rocks often have.

the sword disobeys the light source entirely. the shadow under the rock is thoughtlessly place, you need the think about where the light is coming from and how its hitting the rock to know where to put the shadow.