In photo-realistic rendering for SketchUp, bump mapping is a good technique for simulating bump and wrinkles, highlighting the depth changes of the geometry underlying the diffuse texture. Here are few easy steps on how to make your own bump using GIMP2 (free software).
|Download Gimp Software Here: GIMP- DOWNLOADS|
Sample Stone Wall Texture (Image credit from SketchUp Texture Your Work)
STEP 1: Open your texture image in GIMP2. Click ‘Image’ tab> select ‘Mode’> click ‘Grayscale’
STEP 2: Go to ‘Filters’> select ‘Artistic’> click ‘Photocopy’
STEP 3: Adjust the following value> Click Ok
STEP 4: Export the modified image in JPEG or PNG format
FINAL RESULT: BUMP MAP
To see the difference between diffuse (no bump) and diffuse with bump below are some test render results. (Test Render was done using Kerkythea)
Sample Diffuse and Bump Materials
Test Render Output: Diffuse Map Only
Test Render Output: Diffuse with Bump
As an alternative you can edit your textures online to create different bump materials.
|Here is the Link: Normal Map Onlne|