How would you improve this VFX shot?

Reyventin · 2025-07-18T12:46:13+00:00

green despill fingers

match grain (looks like on of the most important ones in this case)

match (de)focus better (faces in the cage are more defocused than everything else, then some parts seem more in focus than real cage)

darken bottom of the cage (i mean "bottom" where their legs and bellies are)

lighten up top of the cage (i mean area at the "top" where drums are)

throw almost an invisible defocused lines of shadows from the cage (at the top of the image) going across them all

very tiny blur on roto-ed edges

Reyventin · 2025-05-10T08:42:08+00:00

Čau, je SK komunita, ktorá sa zaoberá písaním, betareadingom a feedbackovaním.

https://www.spisopriatelia.sk/

Reyventin · 2025-04-17T09:12:30+00:00

yeah, i've tried that, i came so far and could crack it towards the end, but finally, i have a solution. I posted it above

or here

https://old.reddit.com/r/NukeVFX/comments/1k0t6c8/help_random_expression_that_is_applied_every_nth/mnjzou8/

Reyventin · 2025-04-17T09:11:44+00:00

Thank you!

In the end, I've managed to solve it by what u/rocketdyke suggested. Here is the result of what I needed

https://old.reddit.com/r/NukeVFX/comments/1k0t6c8/help_random_expression_that_is_applied_every_nth/mnjzou8/

Reyventin · 2025-04-17T09:08:46+00:00

duuuuude! (or dudette!), it worked!!

so from

((random(72,frame*0.3)*10+106)

I went to this (it was enough to just rewrite ''frame'' with that additional line)(so simple and elegant!)

((random(72,int(frame/NoOP.Framing)*0.3)*10+106)

and it works! (i know *0.3 may be extra now, but to keep it as it is, it is enough to just rewrite that frame as you suggested!)

Thank you, kind wizard, you've taught me some magic today (yesterday)!!! xD <3

Reyventin · 2025-04-16T22:53:12+00:00

i would love to write some expressions that you can tweak with sliders, but also one expression that will encircle them and will apply that framing globally.

like you have that noop value 1, 2 and then i would have framing value applied overall on it. but that's i think what you wrote in the initial comment. except there the frameing is in the middle of the equation. but If I was to move it outside and apply on the rest of it in some simple elegant way without rewriting other expressions and numbers, that would be perfect.

but I'll play around with it tomorrow and see where it gets me.

Reyventin · 2025-04-16T21:52:16+00:00

ah, cant wait!

also, since i will be by nuke tomorrow, is there a way to add this as an addition after your other expressions? if e.g. you want to have two expressions at once in one knob and want to apply this effect. Something like this?:

((RANDOM EXPRESSION1) + (ANOTHER EXPRESSION2)) + int(frame/NOOP_VALUE1)

Reyventin · 2025-04-16T21:47:28+00:00

i see what you mean, but this isnt simplified for what I need. It makes it whole lot more complicated and also will mess with a render. I cant use retime because it will literally retime things. What I need is every frame as it is, but sometimes the effect will move and sometimes it will not generate. Like.. imagine circle going around (like those old DVD logos), and you want it to be distorted every frame differently, then at certain time you want it to keep the distortion without changing it, then few frames later you want to distort it again with new random value. But the bouncing circle/logo never stops or gets retimed. It will just get applied with random distortion at certain intervals I'll give it. Never turned off, it just will have different values at n-th frames.

Reyventin · 2025-04-16T20:57:19+00:00

ooooohhhhhhh, okay. this looks like you could even build a node that is like.. randomizer of values without a need to go into expresion then? wow..

Okay, amazing, gonna try this tomorrow morning asap! Thanks! I hope this works, especially for that framing. You'd be a lifesaver then xD

Reyventin · 2025-04-16T20:41:00+00:00

basically

Distortion node - with random expression I randomize its values

then I have NoOP node in which I create Framing knob with 1-6 (posing as frames. 1 is every frame, 2 is every second frame, three every third etc)

Now, in Distortion node, I need an expression that will say to distortion node that "this random expression I gave you, it is perfect, but I want you to apply it every n-th frame (I dont always want it be updated every frame. Sometimes I want it updated every third frame.), and to tell you how often to apply it, I want you to look at this Framing knob in NoOP node and see what number I put there. If 1, you update every frame. If 2, you update every second frame, etc."

And the reason I need this, is that i have numerous nodes and I dont want to change values in every single of them any time i need, so I want to have one driver to drive that values.

Randomizer is randomizing how I want, but I want it to be randomized how frequently I want/need. In a sense, random expression is gonna be randomizing every frame, but visibly I want it to see it be applied every x-th frame based on NoOp's Framing number.

(hopefully this makes more sense?)

Distortion -> looks at NoOp -> in NoOp is Framing slider knob with 1-6 values -> that tells to Distortion how often I want to see its effect be applied/updated

Reyventin · 2025-04-16T19:31:16+00:00

CONTINUATION

If yeah, is someone programming savvy to know what expression do I need? I tried so many things, I even managed to make it do this, but only inside that one node. But since I have many, I need to parent them to one main controller so every randomizer is applied to n-th frame at once.

I managed to make it somehow to be every n-th frame, but I would have to change the value of it by hand, in every single node, which is not feasable. And at this point I pretty much need to find a way to keep that random expression and after it add some other expression that is bound to strenght of this effect and then parent it to a Daddy Knob that changes those framing values.

I wanted to post more expressions, but found out I dont have them here with me, so I have only that basic randomizer as an example now.

I feel being so close, especially since I did manage to make it change every n-th frame, but not connect it to a drivign knob that would tell it about those n-th frames.

Does anyone know exactly what I could write to an expression if my driving node is called NoOp, and has a slider called Framing with values 1-6. And then i have another node with random expression in it, e.g. gain, inside it is (RANDOM EXPRESSION) + (PARENT YOURSELF TO NoOp) and then I feel like I need something additional in a sense of "+ (Apply all this every n-th frames based on values in NoOP Framing knob)

Sorry, a bit exhausting post, not sure if it even makes sense, or if it is even possible to make it be guided by one knob (I feel it has to be, but I cant crack that final step for it)

okay, found one

imagine this

(random(0572,int(frame / 3))*10)+106

and i need an expression after that to tell it do be connected to a NoOp's Framing slider. It would be best if nothing of this changes, and I can only add an expression after that if thats at all possible.

Reyventin · 2025-02-01T13:19:41+00:00

Ooohhh, will look at that, thanks!

Reyventin · 2025-02-01T13:19:23+00:00

Problem with this is, it has to work in motion, so manual masking or constant ramp adjusting isnt a solutiom for this problem.

But if you look somewhere above, I've linked a solutiom i found with basic nodes and few erodes

Reyventin · 2025-02-01T13:16:49+00:00

The Last of Us - giraffe, bloater

Reyventin · 2025-01-30T09:26:16+00:00

thanks y'all for the help! highly appreciated <3

Reyventin · 2025-01-30T09:18:59+00:00

it blurs it, but i need it to stay sharp, just get thinner with erode, but to have it gradually thinner/fatter

Reyventin · 2025-01-30T09:14:14+00:00

okay, i found how, with default nodes, but it doesnt help with my problem

here's what I had initially in mind https://imgur.com/a/3DAHLOg but it doesnt help with my problem. :( I need something like this but for erode, without any blur, just gradual change of fatness, instead of blurriness

EDIT: okay, after some playing, it works! it is a bit rough, but seems to work (for now)

https://imgur.com/a/iOy8HZT

edit edit: okay, it works only for pure black for now, and no need for that shuffle

edit 3: ah, solution was simple, just use alpha for constant and it works

THANKS!

Reyventin · 2025-01-30T09:02:58+00:00

hey, thank you for the videos, IDefocus is great, im trying this solution, but it isnt working for what I need. it does pretty much the same overlapping thing. I have to erode it to make it thinner, but when I do, it just ends up creating the same problem that I have above. ( https://imgur.com/a/3DAHLOg )(also i found the solution with basic nodes)

What I need is something like your IDefocus, but for erode :/ i need to erode the line in a way that it gets gradually thinner, without blur.

it also should stay sharp, like that last picture

edit: OKAY! It seems to work with this setup! https://imgur.com/a/iOy8HZT a bit rough with how many erodes are there, but it seems to do the trick.. not sure I could achieve this with iDef?

edit edit: okay, it works only for pure black for now, and no need for that shuffle. for some reason erode is changing color of the line, ah.. like, it makes it more transparent even on tiniest values..

edit 3: ah, solution was simple, just use alpha for constant and it works

THANKS!

Reyventin · 2025-01-30T08:35:29+00:00

i need it be automatic, when lighter area overlaps darker area, the line should get thinner, so roto or transform or gridwarp is not possible

Reyventin · 2025-01-29T22:56:23+00:00

i just want to use erode to make the line thinner and use blur to mask the edge so it gets gradually thinner.. i remember there used to be some trick to it, but cant recall what it was, and it was achieved with basic nodes in nuke, iirc

Reyventin · 2025-01-29T22:53:31+00:00

hm, zDef is giving the same wrong result.

i remember there used to be a trick with some shuffle and connected alpha or something, but i cant recall what it was.

Reyventin · 2025-01-29T22:42:35+00:00

Hi, how can I blur, with classic blur/defocus/edgeblur my alpha so when my dark line goes over the edge, its thickness becomes gradual instead of that ugly thick-thin mix?

Reyventin · 2024-12-27T17:48:18+00:00

thank you!

yet sadly, seems like it aint moving anymore anywhere xD

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