Blender Tutorial: Add Random Variation to Duplicated Objects 

It's simple and effective, it's also short, very appreciated!

it looks so cool and professional! Good work, keep it up!

I think it's fine. Hate loud drum bangs and most music in a tutorial.

Great. It's always good to hear that people are using these techniques in their work.

Thanks Daniel.

I know right? Even if the google gods don't have algos that help him, I make sure at least I tell him, I appreciate his work.

A little clarity to above. Clapboard/Planks work ok in front view of house (narrower). But side view of house (2x longer) causes texture to tile. Help please. TIA

Thanks buddy.

Thanks!

An array modifier just creates instances of the original mesh. So every copy of the object has the same random output. Apply your modifier and separate each copy to its own object, then it will work.

@@DECODEDVFX Thanks.. That worked

You could put the random number output through a color ramp node, then change the ramp to be shades of gray. Now the output of that ramp node will have an upper and lower limit on the number it will produce. I hope that makes sense.

No, you're breathtaking! Thanks for the support.

@@DECODEDVFX do you know how to do the same thing in the model with array modifier instead of duplicate object? cause I think it will be more efficient to use array modifier rather than duplicate. :)

@@caturindrasukmana7673 As far as I know, that's not possible. However, you can create an array, apply it, and turn the array objects into individual meshes (using P>By loose parts in edit mode). That's what I did to make this video.

@@DECODEDVFX Okay I got it. Thanks dude

No. This method requires each piece to be a separate object with it's only random number. You'd have to press P in edit mode, and select "separate by loose parts" to make each object it's own mesh.

You'll need to use a seamless texture or a procedural material.

I'm not sure if you can. Other than by baking the material of each object individually.

​@@DECODEDVFX Yes, you can only bake the material. It's not that complicated to do, but if you really don't want to bother with baking, there is an addon called "Pbr Texture Bakery" on Blender Market which can bake every map you need for you. The only thing you have to do is replace your Principled BDSF node by the Bakery node in the group section.

@@kelvinn2022 You should be able to reproduce this shader in a game engine without baking. There is nothing going on here that can't be done in real time, and many games use procedural generation effects like this to produce shading variation. I don't know how to do it in Unity specifically though.

Glad it was helpful!

There's no automatic way to do it. You'd have to manually add each face to a new vertex group.

This is a really old video. It was probably recorded with a webcam mic.

I forgot about that intro. I think I only used it once.

ctrl+shift+left click with node wrangler enabled shows you a preview of the node. You may want to check out my node wrangler video. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BvfQ1pMxgDk.html

@@DECODEDVFX THANK YOU!

No way that I know of. It has to be seperate objects.

Mb some way through faces index,.. Ok any way great lesson! Mutch usefull when 30+ min Blenders Guru or same.

Forgot to say. AMAZING VIDEO! Thanks for the great content!

68% of viewers were using a computer, if you were wondering.

Array objects are instances, so they all have the same random output as the original you applied the array to. You need to apply the array, then separate each copy to be a different object using P>Separate loose parts.

DECODED There is a work-around that will allow you to use Arrays. You can place your tile as a Child to a simple Parent/Host object using Dupli-Verts/Plane. Once this is done, you can put an Array modifier on the parent object, and you will get unique instances for all the child objects. This works very well, and is non-destructive. But is a long winded, and may not be obvious to everyone.. I think we should raise this to the Blender developer community and see if they can allow an option for Array items to be instanced as well.

Huh?

@@DECODEDVFX The title is: Add Random Variation to Duplicated OBJECTS. But you show: Random Variation to MATERIALS. I look for Add Random Variation to Duplicated OBJECTS. (Cone, Cube, Cylinder, Position, Rotation, Scale).

Thanks! Glad you like it. The intro was actually very simple. I imported the font into Blender and used the text tool to make the text geometry. For the texture, I just plugged a gradient node into the color ramp and changed the ramp settings to be various shades of purple and blue. A mapping node was plugged into the gradient, so I could rotate the gradient to match the original logo. Once I had the gradient in place, it was just a case of plugging the color ramp into an emission shader. I keyframed the brightness of the shader to match the music. I placed the camera above the text, enabled bloom and a few other EEVEE settings, and hit render. The whole thing took maybe 20 minutes. Hope that makes sense.

@@DECODEDVFX thank you very much

Thanks.

Thanks!

The only way I can think to do this with one multi-object mesh is to unwrap everything, then use the random per object output of a geometry node.

@@DECODEDVFX oh, thanks for the quick reply - that's nice idea -I hope blender would make a OBJECT ID feature like in 3DsMax+Vray, which auto detect multiple SubOject, and it's a quicker method for instant random Hue and Saturation - anyway, thanks so much for this helpful tutorial 😀

@@scpk2246 I'd absolutely love a per mesh random node. I might write an add-on for it myself if the blender devs don't do it soon.

@@DECODEDVFX wow! can't wait for you to do that! so exciting

They are all separate objects sharing the same material.

Cool. Thanks.

No.

@@DECODEDVFX any way to do it?

@@SanOcelotl each plank or whatever needs it's own object ID in order for this to work. Each object in an array is an instance of the first, so they all share the same ID. You'd have to apply the array to make the instances real, then in edit mode select everything with A, press P > separate by loose parts. That will make each object separate so this set up will work.

Cheers Jim. Appreciate it.

Thanks Mathew.

Thanks