*_Please keep up the in depth way of explaining the theory behind the graphical ideas._* Big big compliment! There is already enough tutorials out there that just say "hit that button and you'll be fine" and that's about it
Dude, your course and channel have been so worth it! I've been looking for a good channel for DaVinci Fusion and you've become one of my go-to channels! This also clears up some Fusion quirks too! Thanks Bernd!
Sir, thank you again! I'm the type of person that needs to know why and how stuff works in order to "make it stick". Meaning that if I follow some random steps I will forget them in a few weeks. With your help I will become better (say in compositing for example) permanently. Also purchased a few of your courses and they are just gold. Having said that I do understand that diving this deep into color management, etc may not suit everyone but for me it has been priceless. So thank you again, Bernd, for all your great work and keep it coming please!
Excellent, you saved me in an edition, I transferred my 3D composition from blender to fusion, but I had those black edges and I didn't know how to remove them, I was trying erode/dilate but I lost quality, now with this you solved the problem, thanx a lot!
Thanks for this video! The brightness example helped the most, since it finally dawned on me that 0.4/0.5 = 0.8 -> 0.8+0.2 = 1 -> 1* 0.5 = 0.5 which is what is meant by PRE-divide/POST-multiply!
Wow thanks so much I've been doing a ton of compositing and did not understand these pre/post switches, just that it fixed things. Really appreciate the breakdown. Five stars.
Hey, I have a problem when I render something on a transparency. I have a clean timeline, no color correction, a new project, I insert the text, then I render it, set Quicktime, Apple pro res 4444, select export alpha. After the render, I have the text/animation on the transparency, but it looks as if I lowered gain to the whole thing underneath. I don't know what's going on, it should be completely without background. I saw few tutorial to check if maybe my knowledge is wrong, but others do it the same way 🙁 DR version: 18.6.4 build 6, Studio version. I will be grateful for your help.
Thank you! Great tutorial .Davinci and Fusion in Davinci seems not to interpret unpremultiplied images correct! Fusion Studio does. Davinci just "crops" all RGB Values outside the alpha white values. This is realy bad becouse a lot of 3D Programms, and at least from my experience, EXRs are normaly peunmultiplied. I make alot of use of this format, for example, that glows with no alpha are added to the background. I don't know why Davinci and Fusion does it diffrently! I can't fond a way to bring all RGB values back in Davinci. Old Davinci versions did it right, or am I wrong?
Not sure what's going on in your specific example, but generally Resolve and Fusion Studio work exactly the same way and you can defintily load exr files via loader nodes the same way and have full access to all channels. Also unpremultiplied. Could be that there's some difference for certain codecs when going through the media pool or that something else is going on in your flow. Certain OFX effects from the Color page don't work correctly with alpha channels and require some additional care.
If the assumption of the tool are to work with alpha multiply why the tools doesnt have the checkbox pre-multiply alpha active ? We constantly have to do it manualy.
Well that can happen by accident if you do certain forms of manual manipulation on the channel and it depends on what's coming after that what impact that will have. But generally 0 means fully transparent and 1 fully opaque and then you have the levels in between. There's no universal definition of "more than fully opaque" or "negative transparent" that would make any physical sense as far as I am aware of. Unless you really know why you are doing this in your flow, I would probably see it as an anomaly and rather clamp the values to make sure nothing unintentional happens later.
@@VFXstudy for example , "glow" node will always make the alpha more than one. You will find it becomes more transparency if you don't merge anything just connect media out and put another track under it in timeline. And it won't happen if we merge the track directly in fusion.
Thank you for next part of knowledge :) (can I please change language of this movie to english? My english is not so good and yb see this movie as in german language and when I push automatic translate then yb try translate from german :) and quality of translating is fatal - thank you in advance)
What always makes me a bit suspicious of Fusion is: In other programs you spend 20mins watching a tutorial and afterwards you have rebuilt ancient Rome in Space or something. In Fusion you spend 20mins to try to fix something as basic as an Alpha…
No, you can fix it in 30seconds with one checkbox. The rest of the video is for you to understand an underlying principle of image processing that all software will use (either with or without telling you). It will help you one day in the future when your ancient Rome in Space is showcasing some strange artifacts and you can't figure out why... :) ...or when you start building your own custom tools and need to understand some basic image processing...
It also takes 1 second in Fusion. Drag & Drop. Done. Another second if you need to press the multiply button. The rest of the time is for people who want to learn an elementary compositing principle in depth, so that they don't waste hours of fixing edges after incorrectly compositing an image without realizing what they are doing. Doesn't matter if it's After Effects or Fusion.
Amazing! You have very good stuff regarding Fusion, but my suggestion is your videos can be more of action and precise to the content rather than too much of explanation on concepts which it sems a bit boring. Sorry for this to say.Thanks.
Enough entertaining "action" on UA-cam already. Somebody needs to explain the basics for those who are serious about the craft 😋 But yes, there will be more practical effect based videos as well
This is, by far, the best explanation I have found on the Internet of the pre-multiplication issue. Thanks for an excellent video.
*_Please keep up the in depth way of explaining the theory behind the graphical ideas._* Big big compliment!
There is already enough tutorials out there that just say "hit that button and you'll be fine" and that's about it
The presentation still at 19:50 finally has me understanding this concept in a way I can now explain. Great teacher.
Not the easiest of concepts to teach. But I'm happy it's useful.
Dude, your course and channel have been so worth it! I've been looking for a good channel for DaVinci Fusion and you've become one of my go-to channels! This also clears up some Fusion quirks too! Thanks Bernd!
Sir, thank you again! I'm the type of person that needs to know why and how stuff works in order to "make it stick". Meaning that if I follow some random steps I will forget them in a few weeks. With your help I will become better (say in compositing for example) permanently. Also purchased a few of your courses and they are just gold. Having said that I do understand that diving this deep into color management, etc may not suit everyone but for me it has been priceless. So thank you again, Bernd, for all your great work and keep it coming please!
Excellent, you saved me in an edition, I transferred my 3D composition from blender to fusion, but I had those black edges and I didn't know how to remove them, I was trying erode/dilate but I lost quality, now with this you solved the problem, thanx a lot!
Great video! I really appreciate how in depth you went in explaining both the problem and solution.
Thanks for this video! The brightness example helped the most, since it finally dawned on me that 0.4/0.5 = 0.8 -> 0.8+0.2 = 1 -> 1* 0.5 = 0.5 which is what is meant by PRE-divide/POST-multiply!
I ran into this problem the other day. Thank you for this great video. I like the deep dive too.
This is masterwork. Well done!
Thanks a lot!
I have struggled with this alpha divide/multiply concept for ages. With your clear explanation it finally makes sense! Thanks, Bernd.
Wow thanks so much I've been doing a ton of compositing and did not understand these pre/post switches, just that it fixed things. Really appreciate the breakdown. Five stars.
I was having some issues and you helped me completely. Thanks a lot
very good video, helped me a lot
channel Boolean! that's what I was looking for. Thank you.
very nice and very foundational
can you fix this in Edit or Color pages in Davinci without opening Fusion tab?
Excellent
Very good and clear explanation. Thank you
exporting tiff alpha image sequence and opening in blender has this dark edge issue
Amazing! Mind blowing 🤯🤯
Thanks, it clarified many things for me. Much appreciated
Very helpful, thanks!
Hey, I have a problem when I render something on a transparency.
I have a clean timeline, no color correction, a new project,
I insert the text, then I render it, set Quicktime, Apple pro res 4444, select export alpha. After the render, I have the text/animation on the transparency, but it looks as if I lowered gain to the whole thing underneath. I don't know what's going on, it should be completely without background.
I saw few tutorial to check if maybe my knowledge is wrong, but others do it the same way 🙁
DR version: 18.6.4 build 6, Studio version.
I will be grateful for your help.
beautiful
Awesome explanation!
Thank you very mutch!
Thank you! Great tutorial
.Davinci and Fusion in Davinci seems not to interpret unpremultiplied images correct! Fusion Studio does. Davinci just "crops" all RGB Values outside the alpha white values. This is realy bad becouse a lot of 3D Programms, and at least from my experience, EXRs are normaly peunmultiplied. I make alot of use of this format, for example, that glows with no alpha are added to the background. I don't know why Davinci and Fusion does it diffrently! I can't fond a way to bring all RGB values back in Davinci. Old Davinci versions did it right, or am I wrong?
Not sure what's going on in your specific example, but generally Resolve and Fusion Studio work exactly the same way and you can defintily load exr files via loader nodes the same way and have full access to all channels. Also unpremultiplied. Could be that there's some difference for certain codecs when going through the media pool or that something else is going on in your flow. Certain OFX effects from the Color page don't work correctly with alpha channels and require some additional care.
If the assumption of the tool are to work with alpha multiply why the tools doesnt have the checkbox pre-multiply alpha active ? We constantly have to do it manualy.
Great work, thank you man
how do i do this on the edit page without fusion clips
thank you!!!!
Helpful
Sometimes Alpha is more than 1, and sometimes Alpha is a negative number . It will be nice if you could explain it also.
Well that can happen by accident if you do certain forms of manual manipulation on the channel and it depends on what's coming after that what impact that will have. But generally 0 means fully transparent and 1 fully opaque and then you have the levels in between. There's no universal definition of "more than fully opaque" or "negative transparent" that would make any physical sense as far as I am aware of. Unless you really know why you are doing this in your flow, I would probably see it as an anomaly and rather clamp the values to make sure nothing unintentional happens later.
@@VFXstudy for example , "glow" node will always make the alpha more than one. You will find it becomes more transparency if you don't merge anything just connect media out and put another track under it in timeline. And it won't happen if we merge the track directly in fusion.
Thank You ...👍🍻
Thank you for next part of knowledge :) (can I please change language of this movie to english? My english is not so good and yb see this movie as in german language and when I push automatic translate then yb try translate from german :) and quality of translating is fatal - thank you in advance)
Ich Feier deinen Akzent 😂
Thanks
this problem bother me a lot
What always makes me a bit suspicious of Fusion is: In other programs you spend 20mins watching a tutorial and afterwards you have rebuilt ancient Rome in Space or something. In Fusion you spend 20mins to try to fix something as basic as an Alpha…
No, you can fix it in 30seconds with one checkbox. The rest of the video is for you to understand an underlying principle of image processing that all software will use (either with or without telling you). It will help you one day in the future when your ancient Rome in Space is showcasing some strange artifacts and you can't figure out why... :)
...or when you start building your own custom tools and need to understand some basic image processing...
@@VFXstudy Hahaha, ok! Let's tackle those "ancient" artifacts then!
Its called straight alpha not un-premultiplied alpha.
both terms exist and you are right straight alpha is a simpler term. You find both terms in compositing books :)
👍
GOD this is annoying I'm spending 30 minutes why the hell the png just wont import properly this takes 1 second in after effects
It also takes 1 second in Fusion. Drag & Drop. Done. Another second if you need to press the multiply button. The rest of the time is for people who want to learn an elementary compositing principle in depth, so that they don't waste hours of fixing edges after incorrectly compositing an image without realizing what they are doing. Doesn't matter if it's After Effects or Fusion.
🔌
Amazing! You have very good stuff regarding Fusion, but my suggestion is your videos can be more of action and precise to the content rather than too much of explanation on concepts which it sems a bit boring. Sorry for this to say.Thanks.
Enough entertaining "action" on UA-cam already. Somebody needs to explain the basics for those who are serious about the craft 😋
But yes, there will be more practical effect based videos as well
@@VFXstudy Good to know that you are building a strong foundation on subject.
YES Brent, agree/ "Enough entertaining "action" on UA-cam already. Somebody needs to explain the basics for those who are serious about the craft" ☆