dirt maps

[foorked1]

im pretty new to max,

say i would like to add some dirt to a texture, ive already got maps in diffuse and bump. where is best to add a dirt map? can i use a occupancy map for the dirt aswell?

 

thanks

[Justin Hunt]

IF you are use a shader that has Diffuse Level, drop the AO shader there. Works nicly to darken the surface in the corners

 

JHV

[foorked1]

sorry but i dont understand, you are speaking in code language to me.

 

whats the best way to dirty a texture? overlaying a different map?

thakns

[foorked1]

can i use two diffuse maps?

[david.jones]

Id say a good way to do it is to use a composite material.

Use the clean material as a base mat, and then a new material with a dirty colour, and an opacity map.

 

This enables you to use the dirt and the base material independantly, for example, use different uv mapping slots in the two materials jpgs, so if it was tiles with dirt on, and your tiles were 4x4, your dirt wouldnt repeat every 4 tiles, you could uv map with a second uv channel so the dirt in slot 2 is much larger.

 

There may well be another way, but it's a way i've done it anyhow!

[lecameleon]

Umm.. composite maps are alright I guess..

Ok, when I need dirt I generally use Mix/mask.. and use one slot as the main map and use a noise map for the dirt with another noise map for the dirt color embedded in the color gradient of the first noise map..

duh.. sounds confusing..