How To Use A Push Modifier: Make A Cave
How to Use a Push Modifier: Make a CaveCopyright 2017 by Rich Schafermeyer(RGcincy on Daz Forums)This is a tutorial on using a push modifier so that a primitive sphere can be converted into a cave in DazStudio. I was a big caver in my teens and college years, so I have always liked the rocky enclosedatmosphere of a cave. I’ve made artificial caves in Bryce by painting a terrain height map, so this issimilar, but better in that you can get horizontal displacements as well. Here’s a render of the finishedresult:Step by Step Instructions:1. From the main menu, click on Create/New Primitive and set the primary axis to X-positive (thismakes the polygons form a ring vertically), diameter to 50 feet, segments to 100, and sides to 50.1 of 6
2. Scale the sphere as follows: 200% Y, 50% Z, and 25% X. This gives a flattened cigar shape. I rotated it-7.3 degrees Z as most caves have a slope.3. Select the in the Scene pane and go to the main menu and select Create/New Push Modifier WeightNode. You will now see the node added as a child to the sphere in the Scene pane.2 of 6
4. Go to the Tool Settings pane and from the drop down box at the top choose Node Weight MapBrush.5. Half way down the weight map brush pane you will see a section titled Weight Maps. The UnusedMaps box will show New Push Modifier . Click on the Add Map button.6. You will now see that a parameter slider has been added just below the button. This slider affectsthe amount (distance) of push that will be applied. The default value is 1. Set the value to -500(which will cause the polygons to push into the sphere).3 of 6
7. The weight map will already be filled with a weight that needs to be removed (as indicated by thered color). Right click in the viewport and from the pop-up menu choose Geometry Selection/SelectAll.8. Right click again and from the pop-up menu select Weight Editing/Fill Selected and type in a value of0%. That removes all the weight. You are now ready to start painting the weight map.9. At the top of the weight map brush pane, click on the Paint brush icon (upper right with the letterP). Go to the top of the sphere and start painting. The sphere will turn blue, then reddish, then redas you see the mesh deform inwards. Continue painting all over the top, sides, and bottom of thesphere. You may also want to change your brush sensitivity: keep it high for rough forming, lowerfor fine tuning.4 of 6
10. I have found it’s difficult to paint inside the sphere – usually you can’t see the concentric circles ofthe brush - so you’ll need to do most of your painting outside. You can set up a camera inside anduse the Aux Viewport if you want to see how it is transforming (better to use 3DL rendering at thisstage because it is faster to update).11. You’ll want to add SubD to the sphere to make a finer mesh. Go to the main menu and selectEdit/Object/Geometry/Convert to SubD. In the Parameter pane, set view and render to level 2.5 of 6
12. After painting in the deformations, you’ll want to add some smoothing. At the top of the weightmap brush pane, click on the Smooth brush icon (upper right with the letter S). Paint on the weightmap and you’ll see the edges soften. If an area is too high, hold down the Alt key as you paint and itwill push down the mesh. If an area gets too low, hold down Ctrl and paint and the mesh will growhigher.13. I found it worthwhile to make several passes with the paint and smoothing brushes, pushing in,pulling out, pushing back in. That gives greater complexity of form. How much is up to you.14. I only painted the front half of the sphere as you can see here. The figure in the finished render waspositioned just in front of the smoothed portion of the sphere.15. In all, I spent about 15 minutes to create the cave by painting the weight map. I spent much moretime setting up the lights, figure, water (a primitive plane), and rock material than I did to make thecave itself. For the rock texture I used shader 32 from Historical Masonry DAZ Studio Shaders Vol 2with a tiling of 20 horizontal and 40 vertical and increased displacement. But use whatever stoneshaders you have, as different ones will give a different feel to the cave.6 of 6
This is a tutorial on using a push modifier so that a primitive sphere can be converted into a cave in Daz Studio. I was a big caver in my teens and college years, so I have always liked the rocky enclosed atmosphere of a
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