Render Passes (And How To Use Them!)
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- เผยแพร่เมื่อ 20 เม.ย. 2021
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Been searching for this kind of video for ages and then I randomly come across your channel and see you've covered it! The stars have aligned, thank you!
Haha, glad I could help!
This was SO helpful man, been trying to find someone who can explain this as this is something ive struggled with and you've done it spot on man thank you so much!
Glad it was helpful :)
Finally someone explain the use case.
Blender is half knowing where to find the right tutorials and definitions. Great channel.
Thank you! :)
I've known I should learn render passes for quite some time but at first glance found it a little confusing. I started to grasp it a bit but didn't look into it further. This video has made their uses really start to click into place in my brain. Thank you.
Glad I could help!
Same !!! Thanks for the video !! It’s insane and haven’t seen something about that subject before on TH-cam
dude i just stumbled across this video . Went to your patreon and subscribed. YOU my friend are DOPE. you are destined for greatness. I'm Gonna sopport what you're doing.
Haha thank you! Much appreciated :)
I have some base level compositing knowledge and only came here for the passes but damn you've really opened my eyes to some interesting techniques I can't wait to put to use.
Thanks! Glad you liked the video
GOD this is exactly what I’ve been looking for! Thanks
No problem!
As always. Quality stuff !
Thanks Jacob!
Amazing video thank you! I didn't realize you could store that much information into an image, very useful :)
No problem! Yes it's very cool :)
great video man Subscribed :)
Thanks a lot! :)
Thank you man. Very helpful!
No problem!
Man, that normal+position = 3D trick in Nuke is so rad. I'm trying to figure out a way to do it in fusion and am not sure it's possible. It would speed certain workflows up immensely! Great video as always.
Cool isn't it!
Did you ever figure it out?
Wow, bro. Really helpful. Thanks!
No problem!
You advised me that I should join a studio and start my VFX journey, its been 5 months and I've learned a lot. From manual rotoscoping to 2D tracking, camera tracking, creating clean plates(in Nuke and in Photoshop), and matte painting, I'm familiar with compositing basics. Used Nuke for 2D and camera tracking but also used Boris Mocha for things that are in perspective and hard to track. I'm coming to the end of my course. Now I'm gonna attend a test for the studio. They'd test how I'd take a manual rotoscope. I'm a bit nervous about that.. I fear they'd not select me.
I tried to bring an obj file directly into Nuke and tried to add textures but it didn't work out. My teacher told me that I need maps like normal, metallic, glossy, diffuse, and all so that the obj file looks nice. He didn't tell me to export in EXR sequences and use render passes like this. The course has 3d compositing which is left to be taught. Thanks for this .. now i know about render passes before they teach it in classes.
I'm waiting for a video from you that shares tips to rotoscope properly and fast (manual). I know it would be worth waiting. I'll need your wishes for the exam.
Thanks again!!!
Just when I was struggling to composite a 3d object, you release this video..😍😍😍
Can't thank you enough bro..❤️
Perfect timing 😜 you're welcome
awesome tutorial!
Thanks!
GMG!These are uses I haven't seen in the AE tutorial
amazing explanation
Thanks!
You're an absolute weapon!
Haha 😂 thanks bro
Our fav blender compositor artiste from house Griffendor :)
😁♥️
Thank you!
No problem!
Nailed it 🔥🔥🔥
Thanks!
Awesome!
Thanks!
Can I hug you?This cleared up many confusions for a beginner like me and i am grateful 😭😭😭
Glad it helped :)
Hey Alfie as always nice video, but whats that gizmo youre using 04:24 ? , I use layer contact sheet for checkng AOVs but that gizmo looks fancy !!
Thanks nandu! Haha, it's called channel hotbox. It's from nukepedia. It's really handy!
Such a cool tutorial again. Thank you. How do you get that cool tab to choose your different render passes in Nuke?
It's a tool called channel hotbox you can download from nukepedia :)
awesome tutorial.. super 😍
Thanks 👍
hey another doubt about your workflow, u have a denoised beauty. But the passes are noisy right so when u do a From operation it won't be perfect right? Any fixes u found?
Someone else asked about this recently. I haven't found it to be a problem so far but I suppose if the passes were really noisy it might be an issue. I try to render with enough samples that even the denoised passes look good as well
Great tut for me.. tnx sir
No problem!
awesome tutorial, i was wondering which shortcut you used at 4:52 to open that pie meneu to choose different pass?
It's actually a 3rd party tool from nukepedia. I highly recoend grabbing it! It's great and it's free 😁
Hey, Thanks for the tutorial. How did you do in the final composition the emission pass blur and glow above the book. It feels like you combined normal pass and emission together but I am not quite sure. at 4:18 there is a moment you show the photo and I would love to know how you added those straight glowing light lines that go above the book. Thanks
I just separated out the emission pass to put the glow on and then I plussed it back on top :) I didn't out the normal pass back on. That's not part of the beauty image that's for other things like relighting
@@AlfieVaughan Oh yes you can do those straight lines with a simple "Radial Blur" and put the center of the radial blur on the bottom so the glow lines will go above. Thank you very much for the fast response! You are amazing 🙏
I used a volume rays node to make those lines :)
Amazing and really really needed video...but one question..how are u taking the passes out from the exr file ??
Thanks! In nuke you can shuffle them out. If you're using other software they have their own ways. After effects has a plugin called extractor :)
@@AlfieVaughan ookay...but I saw u weren't making any shuffle node but rather u r clicking on the exr node (4:52) and getting all the passes..is it some kind of Script or plugin ??
how did you rendered all channels in a single render ,if i try to render in open EXR. only RGBA is rendered but not passes
and need a solution plz
It needs to be an OpenEXR multilayer, not just a normal EXR
Wonderful
Thanks!
Do you have a video for the vector pass? Haven't been able to even view what it writes into the exr file, let alone use it in a functional way inside Nuke. Thanks in advance!
I don't, sorry. I always render my motion blur in 3D as it looks better and makes the comp less heavy. But all you should have to do is add a vector blur node, set the vector channel to the motion vectors and then increase the strength. I also usually set the drop down to uniform which makes it behave better
1. I wonder if we could generate a 3D forensic scene reconstruction from the normal & position passes. This would be very awesome!
2. If we could 2D paint each pass individually, can we generate a whole 3D scene in Nuke?
You can use the normal and position to make a 3d point cloud, yes.
I guess technically you could paint each pass but I don't think it would turn out how you're expecting. It's very complicated.
Hey. Loved this video. Two questions: Where did you get the "Exponential Glow" from? How do you use rendered lightgroups if you have rendered a Direct and indirect diffuse and glossy. Should I just use the lightgroups or is there a way to combine them or use the lightgroups as "controllers" for the previously named passes?
Thanks! Exponential glow is a third party gizmo. You can find versions of it all over nukepedia. It's much better than the in-built glow in nuke!
For the direct and indirect channels, you need to multiply the colour over then, minus them from the main beauty and then do your tweaks and then plus them back on top
@@AlfieVaughan Okay. Think I understand. I have another general Nuke question. How do you add lens grime? I’ve spent hours trying to get it to work but I’ve had no success:(
Good textures is half the work. Find some good lens dirt textures (there's loads of free ones on textures.com etc) and then blur your footage by about 300 pixels and multiply it over the dirt. Then screen that over your comp. I talk about it in my green lantern nuke tutorial. It's very effective for interactive lens dirt
@@AlfieVaughan Thanks I used both of your tips and it worked perfectly. Thank you VERY much :)
No problem! Glad I could help :)
Thanks! how do get the popup when you hover over the exr in nuke that allows you to view the channels so quickly? is it a plugin?
Yeah it's called channel hotbox :) it's free on nukepedia. It's great!
Thanks Alfie!
hey how do u have those compositing nodes hooked up ready to go every time u open blender?
You can set it up once then save it as your startup file :) it's under file --> defaults --> save startup file
Then when you open blender it starts like that. I also have it set up with all my favourite render settings etc. So I don't have to do it every time!
@@AlfieVaughan thats cool tysm.
It's a nice show off. Very impressive. Unfortunately I didn't learn anything.
😂😂 sorry to hear that!
Hi! Thanks for the video, very helpful! Tell me, what kind of shuffle instrument do you use, where can I get it?
It's called channel hotbox and it's a free pyhton script you can download from nukepedia :) it's great!
@@AlfieVaughan Thanks a lot!!!
Alfie... brother can you please explain compositing render passes on after effects!!....I've seen one on your channel but would you in detail explaining the use of like shadow, diffuse, glossy, volume....crypto etc....using plugins to extract and enhance!! Cheers!
Hey! I'd love to but I don't use after effects anymore I'm afraid so I don't have it 😬
@@AlfieVaughan could you download it for like trial and record a tutorial please, i mean im not asking ,its just a request my friend!!
I can't get the trial anymore because I used to pay for after effects so I've already used it 😬 and it's been years since I used it so I'm a little rusty 😅
@@AlfieVaughan well thanks anyway mahn.... Keep up your good work brother, and please do keep posting interesting vfx tutorials 🙏
Finally thanks u
Haha no problem!
that's litteraly crazy
Thanks!
@@AlfieVaughan you're welcomrme and thanks i just realised the power of nuke x')
Please make a video, or reply , how you render that passed in saparate files from blender?
I use the file output node. I have a few videos talking about it. Check out my tips for blender video or one of my workflow videos
@@AlfieVaughan thanks bro
Top!
Thanks!
Hey, I have a little problem concerning color management
In Blender, I use Filmic for View Transform (don't we all do that now ?), so the light and colors have a better look than using sRGB/standard.
But when I import an EXR in Nuke, the colors are wrong. Wether the project is using default Nuke color management settings or OCIO/ACES, any LUT, anything really, I can't find a way to display an EXR properly (it's either to dark, or the the colors are off, or both), except by doing manual work that shouldn't be needed.
I'm probably doing something wrong or thinking about it in a wrong way, but isn't it supposed to work this way ?
Maybe I'm wrong on the Blender part.
Haha yeah I had this headache too before I started using aces. The thing is, Filmic only works in blender. Nuke doesn't have an equivelant. You can actually take the filmic ocio.config file and use it in nuke but I don't recommend that. It messes with other things like normal footage and creates other problems.
The main thing to realise is filmic doesn't get baked into EXRs from blender. It's only a views transform in blender. It gets baked into things like jpgs and PNGs but linear EXRs don't take the filmic look with them when they get rendered. Which is why it looks very different in nuke :)
@@AlfieVaughan Yeah that's what I thought about it not being baked in EXRs, wich makes sense considering the nature of them. I hoped there was a way to have this type of view transform in Nuke, but apparently no. That's a bit of a shame but I guess I'll do manual work or do the compositing in Blender whenever possible. Thanks !
You can actually do it. You can set nuke to also view it in filmic like I said with the ocio file from blender. I just don't recommend it because it's not really meant to be used like that
@@AlfieVaughan That's why I prefer to avoid it. I'll still give it a try one day maybe, just to see.
@@AlfieVaughan The solution I found was to install ACES in Blender (it replaces all the other ones, wich is annoying, but still works)
Do you ever find that your cryptomatte edges aren’t super clean? Especially where two overlap? I’m not sure if it’s a resolution issue or what, but i always notice it
Can't say I've ever had an issue with that. It could possibly be a samples thing rather than resolution but I've rendered them at firstly low samples and not had issues too. Sometimes in the motion blur maybe...
Occasionally if I'm using 2 cryptomatte alphas and masking one with the other or something then I'll have to use an erode to tweak the edge a little. That's the only time really
@@AlfieVaughan for me, I’ve noticed it even if trying to combine them next to each other in the same matte. This also happens in stills with no motion blur. The effect seems to be lessened at higher resolutions, but it’s still weird to me
That's odd. Ive never had issues like that I'm afraid. Not sure what you could do to fix it either. The only solution is probably just tweaking the mattes in compositing to get them to work
@@AlfieVaughan it seems to be an antialiasing thing. Usually it can be fixed with a tiny erode, but I’ve never heard anybody else talk about it for some reason.
7:15 how did u open that tab in nuke to shuffle out
It's a python script from Nukepedia called Channel Hotbox. It's free! Worth grabbing 👍
Does anyone know why SSS passes have been removed since blender 2.83?
Hmmm, anyone that can use Nuke would know what render passes were and packed their EXRs like a champ...
Overwhelming
In a good way or...?
how can i render uv pass in "green to orange" not "pink to blue" like c4d and other 3d software please
Is there any need to? They do the same thing
@@AlfieVaughan it does not work for me in after effects in pink to blue
That's odd. The colour shouldn't matter. I'd imagine it's something else that's the problem
@@AlfieVaughan ok thank you so much ❤️🙏
Do you think you could make an AE version of this tutorial?
I'd love to see you import all these passes into After Effects... It would really help me! Hell, I'd even pay for such a class/tutorial.
I haven't used after effects in about 6 years I'm afraid! I can't really remember how to use it now
@@AlfieVaughan Haha that's okay! I ended up finding this - th-cam.com/video/qUTx8KSvyJ8/w-d-xo.html
I mainly just wanted to understand how to pull EXR passes into AE! Thank you for the quick reply.
Does glossy equal reflections? terminology seems different for Blender.
Glossy is essentially what would be the specular passes in most other render engines. And no UV is the texture co-ordinate data for applying things to the geometry. Normals are the directional light data
@@AlfieVaughan Am I right in thinking that blender does not have reflections pass or roughness pass?
I have no idea why my renders have a significant amount of noise even after iam employing a denoiser node during compositing in blender. Later when I import that to after effects, it's still does have noise in them. The denoiser works but not in taking out a good amount of noise. I gave 300 samples with 16 light bounces, my card is an rtx 2060.....any tips and advices brother???
Does it actually show it denoising the render in blender? When you're rendering does it says it's denoising the tiles at the top? It sounds like it's not actually doing it. Make sure you have it set to optix in the render settings instead of NLM and make sure you have denoising actually enabled for that render layer
@@AlfieVaughan Yes, it does show!...I've been following your tutorials for sometime now!!! Everything is right just like you've mentioned. Denoising - render - optix, denoising data ON, @ view layer - denoising is checked with all input passes.
NB: The advanced tab in denoiser @ render properties are in default settings
Seed - 0
Square samples unchecked
Min light bounces - 0
Min transparent bounces - 0
Light threshold - 0.01
Should I do something??
@@sahdsalmi3935 how strange. Maybe try reverting to default settings and doing some tests. It sounds like you've accidentally turned it off somehow when it exports
@@AlfieVaughan I've enabled adaptive sampling check box, does it affect anything on denoising. Does changing from multi exr file type to png makes a difference, I hardly need beauty, AO and emission pass
That shouldn't change it. It must be something else. Although I'd recommend rendering to EXRs to maintain the linear workflow for compositing
Video title should be Blender Render Passes!
This applies to all render engines! The names are just a bit different :)
@@AlfieVaughan yes ur right but for SEO stuff it should have been Blender Render Passes, as of now it's good!
Oh I see! I put blender in the tags and the logo in the thumbnail :)
everything is fine in blender render when import it to nuke it shows white screen or red screen any help brother
Did you use the file output node to change the name of the main render channel from image to rgba?
@@AlfieVaughan no
You need to follow the steps otherwise it won't work
is there any pass, through which we can get the details from denoising?
As in the details before it's denoised?
@@AlfieVaughan sorry, i make it right here. While using denoising it's smooths out the minute details normal maps right? is there any way to get them back in comp through any render pass?
You could render another one without denoising and mix back the details in the areas you want it. But it's a bit of a crazy idea
@@AlfieVaughan Non - denoised render would have noise right. How to manage that?.
You can't have both 😂 it's either denoised and loses a bit of detail. Or you have the detail but the noise. If you want the detail without so much noise you need to render with higher samples
so... you dont need to set up anything in the compositor?
Yes you do. The file output nodes all need to be set up with all the passes going into them. If you do it with the built in output in the blender settings it them all really stupid names
@@AlfieVaughan do you know a good video etc? All the tuts I find seem to skip this step.
@jonahoskow7476 I've got a video about my workflow. Go to the blender bit in this video
th-cam.com/video/Ia6qNvjObeI/w-d-xo.htmlsi=PgrSEjNz_J4vIDu-
Can anyone please tell me how to open this TAB at 5:12 .
It's not built into nuke. It's a tool called Channel hotbox from nukepedia :)
@@AlfieVaughan Thanks sir. That was quick :)
No problem! I get comment notifications on my phone so I see them pretty fast :)
👁
👁️
Interesting but nuke broke my brain a bit with all that compositing as I dont know nuke
😂😂😂 that's the idea of tutorials 😎
Wait ... Harry ?!! 😱
😂😂😂 brutal. They're just round glasses hahahaha
Nice video which helps me a lot. But you are speaking so fast! Sometimes it was hard to follow and to get the information right. ;)))
Thanks! Sorry I hear that a lot. Try watching on 0.75x speed :)
oof so useful
Thanks!
Bro i can't talk in discord and i want to Discuss something
Why can't you talk??
Now it is solved thanks
I was makimg an vfx
It will be a night sky scene with fake moon(using blender) and the moon will explode
Bro hpw can i participate in blender challenges
Just join the discord server :) link is in the description. We do them every month!
I cant chat it is saying an error
Plz contact me in discord my id - adityakathait#5922
HOW TO RENDEEEEER SEPARETLY ALL THIS PASSES? T_T
You'd have to have separate file outputs for each
can see why AI is taking over shit just too confusing... every app has a different word for something.
Quite informative, but too fast!!
Try on 0.75x speed 😉
@@AlfieVaughan :P
You should talk faster.
Most people say I talk too fast already! Can't please everyone. You can speed up the video if it's a bit slow for you
@@AlfieVaughanokokok, I was giving a hard time 😆you do talk way fast for my brain to consume. But thank you for the tut!
Oh right 🤣 glad you liked it
Does anyone know why the SSS passes have been removed since blender 2.83?
Good point! I hadn't even noticed but just checked and they're gone. Not sure... Maybe you need some SSS materials in the scene for them to show up. I'll do some tests
@@AlfieVaughan It’s very strange, the option used to be there but now it’s gone.. unless I’m missing something. It’d be great if someone got to the bottom of this. Thanks mate.
Your content is really good btw 🥳