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im trying the illusion one wait for me
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Dec 1, 2020 06:14
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| # ? May 4, 2024 22:11 |
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absolutely, can't wait!
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Dec 1, 2020 06:39
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wow those are all excellent but 25 is incredible and 30??? how in the gently caress lol imma download that sun one when i get home so i can see how the in hell you did it most threads make me feel inadequate but this thread.. this thread is king
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Dec 1, 2020 07:18
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amazing how much simpler that sun shader is when I dive into it. gently caress I must have no imagination.
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Dec 1, 2020 09:54
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i made one more for "fractal" in the background while i was at work https://www.youtube.com/watch?v=9LWdASGR3O8 now to start on "illusion"
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Dec 1, 2020 12:38
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oh my god
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Dec 1, 2020 22:37
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fart simpson posted:i made one more for "fractal" in the background while i was at work pretty cool mate
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Dec 2, 2020 01:21
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i made a penrose triangle im trying to animate it but i made it spin too fast and the black background doesnt really have enough contrast so ill try again https://i.imgur.com/HkMOyPy.mp4
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Dec 2, 2020 01:33
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extremely cool! great job with the vector displacement
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Dec 2, 2020 01:49
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im re-rendering it now with better animation parameters but itll be when im at work so expect the result to be uploaded in like 10 hours or something here's my nodes, it was relatively simple this time, mostly about finding the right angles 
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Dec 2, 2020 02:00
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also not gonna downplay it, i hit my head against the wall for a long time on this one because of the vector displacement stuff. i was getting tons of visual artifacts no matter how high i bumped up the displacement for the longest time and after 2 hours of failing, trying it multiple ways and none of them worked, i had to take a break. in my break i suddenly realized my problem was that i was considering "scaling to 0" should make points disappear, but actually it just moves them to the origin point and drags along a bunch of extra edges and crap with it. so i had to re-frame the problem in my mind away from making a white/black mask and scaling everything in one step, and think more about the actual math involved in multiplying the entire point space at once, and what shrinking and extruding actually mean in vector displacement terms. and then everything kind of clicked into place in my mind
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Dec 2, 2020 02:12
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I’m still firmly in the trial and error stage of thinking about vector displacement
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Dec 2, 2020 02:17
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well it turned out my main problem plaguing me through all of these (some of them it’s not visually apparent but i struggled to some extent with all the vector displacement stuff) was that i was thinking in terms of grabbing out the “edges” of my shape through masking, then moving the edges. actually what i should have been doing is masking out entire slices of the whole object and figuring out not just where the edge needs to be, but how to distribute the point densities throughout space so i was doing the first one of these, not the second:  it mostly looks fine if you stop there, but if you want to do any follow up steps and refine the shape, you can keep bumping up the subdivisions and it won’t really help because you’re just cramming in more point density in the bottom of that where it isn’t needed, and not really adding any more at the top to work with it took me way too long to figure that out, now you know too if you didn’t already. fart simpson fucked around with this message at 02:48 on Dec 2, 2020 |
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Dec 2, 2020 02:43
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so if you were to raise a box out of a plane it’s not about just making a square go up (which will force the sides to exist) but actually creating a side as well as far as what you create in the shader
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Dec 2, 2020 03:15
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echinopsis posted:so if you were to raise a box out of a plane it’s not about just making a square go up (which will force the sides to exist) but actually creating a side as well as far as what you create in the shader so heres a v simple example i just drew up. i have a subdivided plane and i want to make a little smooth hill in the middle. ive turned on a wireframe shader so you can see the geometry involved:  ok, so i mask out the area i want to adjust, and add to the z values right? but that doesn't look like a very smooth hill. it has a big pointy thing a tthe top, and if i wanted to further adjust this shape there'd be no more points to work with:  so what i was doing before in this situation was just cranking the subdivision modifier to 11, which kinda works, sometimes. but what if instead i use math to redistribute the inner geometry without touching the edges of my plane? ive done it here with some vector curves to squish in detail to the center on the x and y axes but theres lots of math ways to do various things like this. if you turn off the wireframe shader it looks like this vector curve node did literally nothing, which is why i wasn't "getting" it until last night. but actually look at what happens to the points, they bunch up toward the center where i want my hill:  now that my geometry is distributed to better support my desired smooth hill feature, i can the exact same hill but it looks way better, and if i wanted to fine tune the details of the top of the hill or whatever then theres plenty of points to work with to shape it: 
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Dec 2, 2020 05:06
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masking? that exists? gently caress I am terrible at this. I understand what you’ve done and it’s good. don’t quite how you’ve moved the points but i get how that fixes the problem
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Dec 2, 2020 05:10
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by masking i mean making a black/white image of the area you want to change. like here i basically just said give me the areas where x and y are centered around 0, 0 with a rolloff for distance. that gives me the following: black is a 0 value, and various shades of grey are positive numbers up to 1 being pure white. the displacement is just taking each point there and adding the black/white value of that mask to that point's z value. so areas where you see that mask is pure black get 0 added to their z coord so they dont move. white areas get 1 added so they move up 1 unit along z axis, etc. that's what i meant by masking
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Dec 2, 2020 05:27
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that ui looks like a nightmare, but i appreciate the work you're all putting out
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Dec 2, 2020 05:48
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Roosevelt posted:that ui looks like a nightmare, but i appreciate the work you're all putting out it’s what you make of it, it’s just a visual programming language with a focus on 3D graphics. pretty efficient for applying texture maps to surfaces but if you want to make a fractal generator or a solvable maze generator it’ll get messy
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Dec 2, 2020 06:14
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i love the hill trick if am fairly proficient at openGL and know how to write very basic shaders, then would it be better for me to move up to writing advanced shaders in code, or to learn blender? on the one hand blender nodes would let me quickly find out not only common shader tricks, but let me experiment quickly with them live to better understand them. on the other hand it sounds like it's non trivial to even get access to an animation time variable in blender, so maybe there's a bit of learning curve that wouldn't generalize to other shader programming?
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Dec 2, 2020 06:15
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Happy Thread posted:i love the hill trick well, keep in mind that we're in the nodevember thread which is specifically an event to limit yourself in blender to just the shader editor. it's normally much easier to animate and extrude etc things than what you're seeing us discuss in here, and normally in blender people are doing a lot more in the object editor and so on and much less geometry stuff in shaderland. you're seeing us talk about it here specifically because it's such a non standard way to use the program
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Dec 2, 2020 06:38
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and here's my final entry for "illusion" https://i.imgur.com/bPxqF26.mp4 great thread jenny, i had no idea nodevember was a thing but im glad you posted this and glad i did some of them. it was fun.
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Dec 2, 2020 13:39
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excellent work! I'm going to have to try boning up on vector displacement for next year
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Dec 2, 2020 15:27
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https://twitter.com/NodevemberIO/status/1344779292920737793?s=20
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Jan 1, 2021 02:56
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i forgot if i said it but i really liked this thread excellent stuff
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Jan 1, 2021 03:30
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in case you missed it geometry nodes are in the mainline blender releases now. nodevember is going to be crazy this year https://twitter.com/erindale_xyz/status/1374404450249404424?s=20
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Mar 23, 2021 23:25
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| # ? May 4, 2024 22:11 |
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they look like diatoms
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Mar 23, 2021 23:33
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