octane 2021 version of dirt cannot take effect on bump Tweet

[frankmci]

I've seen replies, dirt and tex multiply and then connecting to bump is useful, but what I asked is that dirt connecting to bump is completely useless when there is a map as dirt map

I don't think it is clear exactly what it is you are trying to do. Can you post a simple example, such as the one I offered previously?
viewtopic.php?f=85&t=80831&p=422825&hilit=dirt+bump#p422825

[W_RTF]

I've seen replies, dirt and tex multiply and then connecting to bump is useful, but what I asked is that dirt connecting to bump is completely useless when there is a map as dirt map

I don't think it is clear exactly what it is you are trying to do. Can you post a simple example, such as the one I offered previously?
viewtopic.php?f=85&t=80831&p=422825&hilit=dirt+bump#p422825

If I use a texture map as a dirt map, the edges will look more natural. If I multiply dirt with texture using your method, the edges will appear mechanical and very unattractive.

[W_RTF]

Could someone answer this question?

[hazenkind]

Now it's version 2023
Could someone answer why tex connected to dirt node can't be used on bump

Have you read the answers before posting?

The Video where we can see that its possible TO CONNECT? I´m pretty shure the guys want mask a noise with dirt to get worn edges?!

[frankmci]

If I use a texture map as a dirt map, the edges will look more natural. If I multiply dirt with texture using your method, the edges will appear mechanical and very unattractive.

You can use any blend mode that you like. Multiply may be too aggressive for the look you want. I usually put a Gradient or two in there for finer control of the drop off, also. Try Subtract for instance:

[W_RTF]

If I use a texture map as a dirt map, the edges will look more natural. If I multiply dirt with texture using your method, the edges will appear mechanical and very unattractive.

You can use any blend mode that you like. Multiply may be too aggressive for the look you want. I usually put a Gradient or two in there for finer control of the drop off, also. Try Subtract for instance:

Thank you for your answer. I think my problem is that dirt with texture doesn't work on bump channels

[frankmci]

Thank you for your answer. I think my problem is that dirt with texture doesn't work on bump channels

The origin of this thread was about Dirt not working with Bump, but it does with a little finesse. My response was that Bump doesn't like the raw data type output by Dirt, but once it is transformed by another node, it works fine. Here is the same material used only in the Bump channel.

Texture Minus Dirt in Bump

... and here's a version closer to the material shared in the original post:

Simpler Dirt plus Noise into Bump