Smoother transition between dirt tyre layers

[VSMaster]

Is it possible to make a smoother transition between the dirt layers of the tire instesd of having it appear immediately once you on grass or gravel. The amount of the texture used would be the same, just something like the layer appearing progressively until reach max opacity. I hope i could make it clear..

[h106frp]

Are you using transparent layers for the dirt? 

[VSMaster]

Are you using transparent layers for the dirt? 

Of course. But I'm not reporting an issue, mine is more of a suggestion

[h106frp]

I did quite a bit on this a while back and managed to get a pretty decent transition without the striping effect as it suddenly changes and it all came down to the correct use of transparent dirt layers on a fixed base tyre texture.

[VSMaster]

Oh ok. I'll try thanks

[h106frp]

This is what I managed to get