Blender Geometry Nodes - Morph Between Meshes 

LEGEND. Thank you for solving my problem :)

Sample Nearest node also need to connect with Sample index's (in index dot) then only it's working.

@@YNT49 yes thank you it does work with when you plug an index node to the index slot of the sample index node. So anyone watching , if they are having difficulties, this still works in latest version of blender (march 23)

Set Points from 'Distribute Points on Faces' to Geometry in 'Sample Index', then create 'Position' node and 'Index' node, connect them into Value and Index node of 'Sample Index'' and it will work.

@@olekstarasov Legend

omg u saved my sanity

weird... havent seen that before. Check my pinned comment in case ur in a newer version of blender. or share your file in my discord 'help' section.

you can use a math node to add a noise node and keyframe the intensity of that noise so at the beginning and end of the animation there is no noise.

Thanks for the sub!

thanks boss. fyi - you can also get bloom in cycles by using the compositor's glare node. for cycles it's not realtime in viewport until the next version on blender.

yes - you can create an "attribute" (variable) that you pass to a shader

@@RobbieTilton Thank you so much for your answer. Could you please explain it a little more in detail? How to assign specific colors to specific particles? It is very important for my life to have a solution for this. I really appreciate your effort. Thank you in advance Robbie

Doesn't adding materials and stuff to it become harder then?

it is possible if the geometry of two meshes are the same (vertices, edges and faces keep their original relationship) then you can use vector displacement in texture shader or use geometry nodes to do that. If you use two separately created mesh with different topology, then I guess you should use a program to determine which point moved to where and generate a 3d vector field and use displacement or keyframe to achieve that. In many cases, "smooth" transition is mathematically impossible (see topology related topics, an example is transforming a donut to a sphere, but visually you can do it just fine)

in 'object info' node set to [relative] instead of [original]. then it'll move between the position of the suzanne mesh and sphere mesh.

with shader programming you often store position in the rgb channels of a float3 or float4 so the mix node comes naturally based on that practice.

you can press shift + a in nodegraph and instance UV Sphere

I did it exactly like your tutorial but the mix rgb is different and the sample index is maybe different. I can pay if you can help.

@@RobbieTilton and I can’t get the same result

@@13thnotehifireviews7 check pinned comment that says how to use sample index node

press i when mouse is hovered over any input and you can insert a keyframe.

you could do something like this tutorial mixed with blendshape export ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sdl-jpZ0NR0.htmlsi=qTSultqa0ymCMqBX and then on UE side you'd need to code a script to take the verts and do what you need to do there

in 3.3 everything works perfectly as shown on the tutor

That’s what I’m getting too, so tutorial no longer works. I’m moving the slider which just moves the position of one shape until it’s roughly the same size as the particle shape you set for the simulation. Is there a way around this. I’m using blender 3.4.1

thanks!

interesting question. If you want solid objects to morph you can use the volume to mesh node in blender3.2. If i have time to try it myeslf I will make a new video for it.

interesting question... at some point i think you'd need to do a crossfade, but you could perhaps have a really high particle count to help make it less noticable

feel free to share ur file on my discord 'help' channel

i've coded for 10 years so i use a lot of that thought process to help figure out which nodes to use. You could easily transition the colors. You can just keyframe the color in the material shader graph to match the keyframes in your geo node. graph

@@RobbieTilton Thank you for your answer! > keyframe the color in the material shader graph to match the keyframes in your geo node. graph So, ... I should use... shader node??? Or can I just keyframe on the Principal BSDF in the material property window?

@@daysmiscellaneous9569 u can keyframe the Principal BSDF in the material property window

@@RobbieTilton Thank you! Í'll try!

for 3.4 - you can use the SAMPLE INDEX node instead. Set it to Vector/Point and it will work just as before.

by default 'position' node will refer to each vertex position in the geometry. It essentially runs the same operation onto each vertex (separately) all at the same time. We use the transfer attribute node to store each vertex position of a different geometry. So then we are able to mix the vertex positions of the default with the vertex position of the stored. It is indeed a hard concept to wrap your head around because the same node 'position' can do several different things based on where its plugged in via node graph and if other nodes are intercepting it.

@@RobbieTilton Ok, I think I understand better this, thank you! One point that was really disturbing to me was to know how the position node selected the "default geometry" but by making some try I think I understood that it's the geometry directly linked to the group output. I'm new to geometry nodes and the technic used here is not something I would have spontaneously thought haha but I guess I need more experience to get it. Anyway thank you for all!

@@lpzmxiv136 no prob! yah - to make it more confusing sometimes position can refer to the entire objects position rather than the vertex's.... all based on the nodes that come before and after it... maybe one day they'll make it easier to understand

@@RobbieTilton Geometry nodes are a really weird place 😂😅

just tested. it indeed does work

@@RobbieTilton Hmm, so I must be doing something wrong. I've tried to transfer a MetaHuman head modified on Zbrush to the same MetaHuman head without new sculpting (I'm still using UE4). Everything is squashed. I'll try to follow step by step and see what I did wrong. Thank you for checking it out!

@@Amelia_PC hmm... i havent dealt with metahuman heads but maybe it's the scale that it comes into blender. try pressing cntrl+A to normalize the scale to 1,1,1

@@RobbieTilton I think the scale is right. I've been modifying Metahumans heads sculpting them on Blender and using the scale 0.01. Never had any problem with it until now. I'm sure the scale is right in Zbrush to Blender as well. But I forgot to mention I'm using the latest NVidia Omniverse Blender version. I'm not sure if it's relevant, though.

@@Amelia_PC u can send me ur file in the 'help' section of my discord. i'm still suspicious of the scale being the root of the issue. sculpting at .01 scale isn't a problem, but when you're instancing points of a non-normalized scaled mesh it could get wonky.

add another Mix node

@@RobbieTilton colour mix node are only 2 values. Is there a node I can use with 3+ values and slide between these?

@@jamesxxxyz8775 you can use 2 mix nodes to mix 3 meshes. one mixing the first 2 meshs. and another mixing the previous mix node result and the 3rd mesh

@@RobbieTilton This is not happening will you please elaborate this please. or make a video on that please

@@muzaffarhussain6183 I've posted a blender file that mixes 3 meshes using this technique to my discord 'help' section

follow the steps again in detail and it will work. every time someone has the issue you're mentioning - they ended up miss-connecting a node.

what do u mean? the keyframes is how you animate it

tutorial came out 2 years ago and geo nodes has changed a lot since then. Sorry if it no longer works, but you can always download the file on my discord/help section and download the older version of blender

shape keys would require each mesh to have the same vertex count

hover over the value you want to keyframe with your mouse cursor and press 'i' on the keyboard

@@RobbieTilton do you mean from the mix rgb? im a beginner and little bit lost..and what keyframe should i put?location or rotation or something?

@@metacoder4912 yes - hover your mouse over the value field in mix rgb node and press 'i'. that will create a keyframe wherever you are in your timeline

​@@RobbieTilton thanks a lot i figured it out now

see my pinned comment

sample index node is not similar in terms of work transfer attrebute .. I hope to make a new video to clarify the work .. with many thanks

just keyframe the Mix node by hovering over the 'frac' number and pressing 'i' or you can right click insert keyframe.

insert keyframe. hover and press [i] on keyboard

I 'pinned' the geo nodes window. See 0:37. Pinning keeps the window up even when its not the active object.

@@RobbieTilton ooh, didn't know that. Thank you!