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.
To get some roughness I can connect the base texture color channel to the roughness channel
we need a color ramp to improve things
to check the effect of a node I can mute/unmute with M to see the effects of it
If we introduce more black we make the stone more shini
Control + shift_ left click shows what the node is doing
We need to flip the colors
we can check the map with control + shift+ left click
We now want to add some bumps to the rock
the result is very noisy
We need to reduce the strngth
We can add a color ramp before the Bump
Set the steength to 1 in this exercise.