[blender] Based on the experience of image map river channel compilation
words written in front
When building a river channel model based on an image map, the height of the river bed needs to be lowered below the ground to facilitate the creation and display of rivers. A common method is to sink the riverbed as a whole, or the riverbed and the ground have a certain slope. As shown below.
sinking of the riverbed
river bed slope sinking
Both methods are relatively abrupt and the effect is not outstanding.
Of course, fine-tuning can be done. This method is not only inefficient, but also the effect varies from person to person.
subdivision replacement method
First, the image is processed in grayscale
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Use the magic wand to select the river area (here pay attention to the tolerance range)
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Create a new layer and paint the area black (the boats on the river are also painted black)
- Create a new layer, paint the layer white, and place the black layer on top of the white layer
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- Select the black layer, and select Gaussian Blur in Filter-Blur (here, pay attention to the radius of the blur, try to be as large as possible without affecting the boundary)
- save as picture
blender subdivision displacement
- With the terrain selected, add surface subdivision and displacement in the tools. Choose simple subdivision, and fill in 6 for view and rendering (the larger the value, the more subdivided). Replace click New.
- Open the previously generated grayscale image in the texture properties
3. Return permutation. Change the coordinates to UV; change the direction to normal or z; adjust the strength/strength as appropriate
4. Convert the terrain to a mesh. If you think there are too many faces, you can limit the integration.
final effect
