Texture painting technique has got a limitation due to the material reaction to light. The block on the right bottom corner has been texture painted. A texture painted material hasn’t got a normal map.
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-944.png)
To get some roughness I can connect the base texture color channel to the roughness channel
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-945.png)
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-946.png)
we need a color ramp to improve things
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-947.png)
to check the effect of a node I can mute/unmute with M to see the effects of it
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-949.png)
If we introduce more black we make the stone more shini
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-950.png)
Control + shift_ left click shows what the node is doing
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-951-1024x959.png)
We need to flip the colors
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-952.png)
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-953.png)
we can check the map with control + shift+ left click
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-956.png)
We now want to add some bumps to the rock
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-957-1024x796.png)
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-958.png)
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-959.png)
the result is very noisy
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-960.png)
We need to reduce the strngth
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-961.png)
We can add a color ramp before the Bump
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-962.png)
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-963.png)
Set the steength to 1 in this exercise.
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-964.png)
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-965.png)
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-966.png)
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-968.png)
![](https://www.kingpengstudio.com/wp-content/uploads/2022/10/image-969.png)