Easy question for you: how to do mold and humidity effect?

[decumano]

Hi, I know it's an easy question for you, and if you need I will delete this topic after I resolve.

I need to know how to do something like this

Should I overlap two textures to get the humidity/wet effect up over the floor and to get the darker portion of the wall? Or maybe is in the wall material editor the solution?

Don't know.
Thank you for your help as usual

[dkendig]

TexDirt is probably your best bet for achieving this effect.

[valerostudio]

Honestly, the best way to achieve what you are looking at in that photo can be done 2 ways. 1. Map a large scale map of the brick with the staining applied to the texture
2. Just add the grunge in post

Here is a great resource for grunge textures
http://www.cgtextures.com/

[valerostudio]

Nomer get's into a technique on his website.

Use Image Editing Software Inside SketchUp :: SketchUp 3D Rendering Tutorials by SketchUpArtists

By Nomer Adona This simple little tutorial will show you how to edit a texture image right inside SketchUp with Photoshop or whichever image edit

(www.sketchupartists.org)