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VRay.com - Your source for all things VRay  ::  VRay for SketchUp  ::  Manual  ::  Bump Maps

VRay for SketchUp Manual

VRay for SketchUp Manual

Bump Maps

Adding a Bump Map

Although we can use Bitmap for most materials of the objects, some textures like wall surfaces, tile, wood, oil painting, leather and water, which all have an uneven surface, must use Bump map in order to create them.

1. Click on the brick cube and open the Material Editor to edit the Bump map to the brick material. Under the Maps from the right side of the Material Editor, check the Bump and click on the "m" to open the Texture Editor.

Adding a Bump Map - Step 1

2. Same as before, select Bitmap under the Type pull down menu.

Adding a Bump Map - Step 2

3. Click on the "m" to the right of Bitmap, select the appropriate grey-scale bump map texture for the brick.

Adding a Bump Map - Step 3

4. After importing the map, if the Bump map is the same as the Diffuse map, make sure the U, V Repeat under UVW Transform have the same value. For example, if Bump map is using U: 2 and V: 2, the Diffuse map should be the same. Otherwise, these two maps will not align correctly. Also, start the Multiplier on the left side with value like 1 and increase as necessary.

Adding a Bump Map - Step 4

Image on the left is result of using only brick Bitmap. The surface of the block looks very smooth. Image on the right is rendered with Bump map added to the entire block. Obviously you can see the Bump texture within the brick surface.

Bump map comparison

And also, earlier we talked about using Reflection>Glossiness to adjust reflecting material's glossiness and create frosted look of the object. If add a little bit of Bump map to it now will make the object look even better.

Image on the left is using only Glossiness from Reflection setting. Image on the right has Bump map added to it.

Bump map comparison 2

Below are some examples of textures created with Bump map.

Bump map examples

Bump map is created using the grayscale of the Bitmap to set the high and low texture. The bright part of the Bitmap is considered as the high part and the dark is low. The Bump map is seen more clearly at the part where the object reflects most of the light. Using a Bump map texture to create bumped texture is only a visual effect, not the true surface of the object. Look at the edge of the object and you will still see the smooth surface.



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Rendering by Brice Desportes


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Rendering by Mads Bjerre Olesen





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News News

Monday, August 28, 2017

Corona Renderer Now Available

Corona Renderer is now part of the V-Ray family


Corona Renderer



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