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VRay.com - Your source for all things VRay  ::  VRay for SketchUp  ::  Manual  ::  Transparency Mapping

VRay for SketchUp Manual

VRay for SketchUp Manual

Transparency Mapping

What is Transparency Mapping?

Transparency mapping is another method using Bitmap to create materials. The difference is that this is using an alpha channel to get rid of unwanted part of the Bitmap, saving only the part covered by alpha channel. This is called a mask.

Transparency Mapping

This is used mostly for creating product logos, stickers and numbers. Many users try to avoid using transparency mapping and model the actual object in the scene. Although you can ignore material settings by creating the actual model of objects, that will increase both the number of objects in the scene and the file size. The more objects you get, the longer the rendering time you would need.

You will get the result as the image below if you apply the texture map directly without transparency map. The black background of the texture map is blocking part of the block. The image on the bottom is rendered with transparency map.

Here is the object and the transparency map that we will use to create our label.

Transparency Mapping example object

Transparency Mapping example map

You will get the result as the image below if you apply the texture map directly without transparency map. The black background of the texture map is blocking part of the box . The image on the bottom is rendered with transparency map.

Transparency Mapping example 1

Transparency Mapping example 2

1. Open Block-Red.skp select the block and open its Material Editor. Select "Block-RedMap", right click on Diffuse Layer to add new layer and you will have the dialog window as the image on the bottom. Change its diffuse color to red (R-244, G-40, B-11).

Transparency Mapping - Step 1 - Add new layer

Transparency Mapping - Step 1 - diffuse color

2. Select the first diffuse layer and click on the "m" at the right to enter the "Texture Editor". Load the bitmap you wish use for diffuse texture map.

Use Photoshop, PhotoImpact and similar image editing software to create black and white image and save as .bmp, .jpg or .png which are the formats accepted by V-Ray.

Transparency Mapping - Step 2 - diffuse layer

Transparency Mapping - Step 2 - load diffuse texture map

3. Click on the "m" at the right of "Transparency" and load the bitmap you wish use for transparency map on the "Common" properties enable "invert" to invert the bitmap.

Transparency Mapping - Step 3 - load bitmap

Transparency Mapping - Step 3 - invert bitmap

Render it and you will get an image like the example below. the transparency map is covering the entire block.

Transparency Mapping - Example final render


V-Ray 2.0 for SketchUp

V-Ray 2.0 for SketchUp
 
 
  V-Ray 2.0 for SketchUp Service Pack 1 Now Available
 

V-Ray 2.0 for SketchUp Service Pack 1 is now available for download. A few new features have been added and improvements have been made to many current ones. Also, V-Ray 2.0 for SketchUp now supports SketchUp 2014.

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SketchUp 2014 Compatible

 

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V-Ray 2.0 for SketchUp is a massive upgrade to V-Ray for SketchUp which includes a series of new feature introductions that enhance visualization workflow and render quality such as V-Ray RT, V-Ray Dome Light and streamlining scene complexity with V-Ray Proxy.

V-Ray 2.0 for SketchUp
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Monday, March 24, 2014

V-Ray 2.0 for SketchUp now supports SketchUp 2014

V-Ray 2.0 for SketchUp now supports SketchUp 2014

V-Ray 2.0 for SketchUp Service Pack 1 is now available for download. A few new features have been added and improvements have been made to many current ones.

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