Apply the Material to the Geometry in Software

Encode QR Code in Software Apply the Material to the Geometry

Now that the material has been created, we will apply it to the geometry This involves making some adjustments to the nodes attributes and connections

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In the view window, select the three main objects in the church model: main_base, RT_tower, and LT_tower In the Hypershade, RMB-click the mStone material and choose Apply Material to Selection from the resulting marking menu In the view window, press the 6 key to see the texture maps You should notice that while the appearance has changed, the texture is difficult to recognize To fix this, we will set the projection type and edit the placement nodes Select the proj_stone projection node and view its attributes in the Attribute Editor The projection type is currently set to Planar, which means that the texture is projecting along one direction While this may look correct for the front of the church, the textures on the sides will smear To fix this, set the Proj Type to TriPlanar and then click the Fit To Bbox button, shown here This changes the projection type and then moves and scales the projection to fit the selection This placement information is stored in the placeStone3D node Do a test render to evaluate the placement of the current textures While it is starting to look better, the placement of the bump maps is out of sync with the color map that we just added To fix this, we ll connect the placement nodes that are currently connected to the color texture and projection and connect them to the nodes controlling the placement of the bump In the Hypershade, locate the placeStone2D node and MMBdrag it on top of the tStoneBump node When you let go of the MMB, a marking menu appears Choose Default This makes all of the connections that we need between the placeStone2D and the tStoneBump nodes

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Connecting the placeStone3D node to the proj_bump_stone node requires a little more work In this case, choosing Default will not make any connections for us but will instead prompt us to make our own connections by opening up the Connection Editor With the Connection Editor, you want to connect the World Inverse Matrix on the placeStone3D node to the Placement Matrix on the proj_ bump_stone node, as shown here: Now that these connections are made, you can delete the two placement nodes that are no longer connected to anything Figure 18-2 shows the completed shading network for the stone material Since the textures and projections use the same placement nodes, we only need to edit the placement in one location This is just one of the big advantages offered by node-based shading networks The completed shading network for the stone material

FIGURE 18-2

Set the proj_bump_stone Proj Type attribute to TriPlanar Do a test render of the scene to check your placement It should look something like the scene shown in Figure 18-3

FIGURE 18-3

While the texture is projecting properly, the scale of the stones in the texture is too big Texture maps should communicate a clear sense of scale to your geometry With stones that large, the church would have to be the size of a toy playset Since this is not our intention, we will increase the tiling Select the placeStone2D node and set the RepeatUV attributes to 5 and 5 Do a test render It should look like the image shown in Figure 18-4 Compare this to the image shown in Figure 18-3 and notice how the texture looks like it meets the proper scale that we need for a large building

FIGURE 18-4