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I’ve downloaded this model of a Crown of Thorns, but noticed that it’s got no thorns although the render image had them.

Image of render

How can I make thorns for this model?

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    $\begingroup$ I suggest you to model it by yourself from scratch. I guess the model from your link doesn't use modifiers so you'll have to model each spike individually. Using @Alois Coissard 's and mine methods'll allow you to create them all automatically and have the better control on the object's shape (thanks to modifiers). $\endgroup$ – Paul Gonet Apr 25 '17 at 14:01
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You may create the thorns fast using some modifiers. enter image description here

Add two (or more) cylinders and place them next to each other. Model the spikes. Join cylinders with Ctrl+J in Object Mode. Press Shift+C to place the cursor in the center, then press Shift+Ctrl+Alt+C-->Origin to 3D Cursor. Press Ctrl+A-->Apply Rot&Scale. Add a Bezier Circle also (Add-->Curve-->Circle). enter image description here

Select cylinders and add the Subsurf and Simple Deform modifiers. Add some subdivisions in Subsurf panel. Smooth the object using smooth shading in the Transform panel of the Tool Shelf (T). Set the Simple Deform type to Twist and set the angle to 180 degrees (or other value depending on your preferences). enter image description here

Next add an Array modifier. Set its Z offset to 1.000. Check the Merge checkbox. Increase the Count number. Then add a Curve modifier and set the Bezier Circle as a target. enter image description here

Remember of the proper order of the modifiers. This is the key to make it work as it should. enter image description here

Finally select the Bezier Circle and go to the Curve header. Check the Stretch and Bounds Clamp checkboxes. enter image description here

Try to add more cylinders and randomise the spikes positions and directions for the different results. You may also apply the modifiers (without Subsurf) at the end and randomize the size, shape and direction of each spike to make it look more realistic. enter image description here

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  • $\begingroup$ Oh, it's simplier this way :D. Good job ;). $\endgroup$ – Alois Coissard Apr 25 '17 at 14:12
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I think I found a way to make your crown in few steps.

  • Create a simple circle, and move it in edit mode, according to the pictures.

enter image description here enter image description here

  • Add a screw modifier like this.

enter image description here

  • Create a Bezier Circle, add a curve modifier to the first circle, and then select the Bezier Circle in the modifier panel.

enter image description here

  • Apply all the modifiers, and then you can duplicate your new object.

enter image description here

  • Now you can extrude some parts of your crown and make the thorns. Don't forget to smooth the vertex, and add a subdivision modifier for a better result.

enter image description here enter image description here enter image description here enter image description here enter image description here

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    $\begingroup$ I haven't thought about using the Screw modifier for this. Nice one! $\endgroup$ – Paul Gonet Apr 25 '17 at 14:29

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