How to Create a Transparency 3D Map in Photoshop

 




To create a transparency map in Photoshop, select the white of the colour map with the Magic Wand tool. Then, attend pull-down menus Select>Inverse to pick the leaf. Ensuring that the background color is black, delete the leaf from the image, which can leave you with an easy black-and white silhouetted version of the leaf. This is often the start of the transparency map. 

                        

The black section within the shape of the leaf will signal to the 3D application that this section is to be opaque-we should be ready to see the colour from the colour map. The white section tells the appliance that these areas of the colour map aren't to be rendered- they're to be seen as transparent and not stop any light rays traveling by.

 

One note here: The black-and-white paradigm of whether the black or white is transparent could also be different in your chosen application. See your manual for the small print. One common problem with transparency maps is that they're not defined tightly enough, and therefore the resulting render leaves alittle white outline. To make sure that the transparency map doesn't allow any of the white from the colour map to render, we'll adjust the transparency map to be a touch tighter. With the leaf still selected, attend the Select>Modify>Contract pulldown menu.

 

At the resultant panel, enter "2" pixels. This collapses the leaf selection altogether directions by two pixels. Now attend Select>Inverse again to pick the white of the image and therefore the new contracted leaf. Use the Edit>Fill>Foreground Color pull-down menus to fill with white. If your program defines opaque and transparent images, use the Image>Adjust>Invert pull-down menu to invert the whole image.

 

Save this file as something like "LeafTrans.tif." To further refine this leaf texture, create a bump map and a displacement map. to make the bump map, open the colour map (LeafColor.tif) and convert the image to grayscale by getting to Image>Mode>Gray scale. With this gray scale image, the 3D application can render certain regions as raised-in this case, the white veins that run through the leaf.

 

You may wish to further augment this map by increasing the contrast of the grey scale with the Image>Adjust>Brightness/Contrast or Image>Adjust>Levels pull-down menus. The result should look something like. Save the file as "LeafBump.tif." For the displacement map (the map which will actually affect the geometry of the object), we'd like to be a touch more selective, alternatively the leaf are going to be so displaced from the knowledge given it that it'll appear as if it's been run over by a truck. To try to this, create a replacement layer over your bump map.

 

 

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