Silverwing Quick-Tip: Octane Camera Projection
Вставка
- Опубліковано 13 чер 2024
- Made Using C4D 2023.1.3
Octane 2022.1_R8
Octane Projection Setup Scene:
drive.google.com/open?id=10N-...
Hello everyone.
After last weeks almost 1h "Mega-Tip" here´s a short one again, where I show two ways how you can setup a proper camera projection within Octane in Cinema 4D
Thank you very much for watching.
P.s. leave a comment if you have any good Idea for a future quick tip / tut.
0:00 Intro
0:32 C4D Simple Scene Setup
3:07 C4D Native Projection Setup
3:46 Explaining what happens in the Background
5:44 Octane Native Projection Setup
6:16 Flipping the Image
6:33 Setting Projection to World Space
7:12 Fitting the Projection within the Field Of View
8:25 Collecting Ideas for Dynamic Projection Setup
9:06 Xpresso to the Rescue
10:07 Setting Up the Xpresso Math
12:52 Final Test of the Projection
13:40 Outro
Omg thank you so much. Searched the whole of the internet last week for this exact thing and couldn’t find anything. Made my day! ❤
Oh wow. What a coincidence! Very nice to hear that!
Thanks for this. Very helpful. Its honestly pretty nuts that we need to faff around with expresso imo.
Oh, thank you very much. And yes, I totally agree that this should be more easy.
Hopefully there is a better way in the future!
This is the case when you learn a lot about the X-Presso itself, not just the camera projection topic :)
Ha ha. I did not think about that. But great to hear.
Cheers and a great time to you!
I had a project a few months ago that required projection and I had to manually adjust the aspect ratio numbers until it fit perfectly. This would've been so helpful.
Thank you so much! Great tutorial!
the one and only
Thank you so much for your kind words. That is a great compliment!
Cool, very excited for the next upcoming topics! Thanks.
Thank you. I definitely have some exciting ones on my list 🙌
Extremely helpful, thank you very much!
Super nice to hear that 🙌
Thank you Raphael! Learned new things, again :)
Also thank you for watching.
Great to hear that!
You make everything look so easy….😊
Thank you. Let me assure you that there is a lot of research going into every video just to make it look like it´s easy in the end 😇
Very nice! learned something new in Expresso today, and thanks for the setup download!
Oh very cool. Glad to be of help 🙌
Cheers and a great start into tis week to you!
Thank you as usual maestro
Thank you. Glad it was useful to you!
Beautiful! I am always learning something new!!
Already created a preset to my library!
Thanks a ton!
Thank you very much Fernando. That´s amazing to hear. And yeah. Save those presets to stay ahead of the curve 😎
Nice one! always helpful!
Thank you. Great to hear that 😊
Great tutorial, thank you.
Glad to hear that. Thank you very much!
AWESOME!!! THANK YOU!!
You're very welcome! Glad you liked it!
Nice tip! 🙌
Thank you very much!
Happy projecting 🎉
Thank you. Likewise 🙌
We are very aware of the effort you have put in, as a community. However, I have a request, which I'm sure other friends would also want. There should be a way to use the shadow catcher of the Octane render engine as a reflection catcher as well, without being confined to the layer ID. If you find a way, please share it with us. It becomes essential in projects where adding a 3D object to a video is crucial.
When i get such job and i dont want to get killed i will pass it to you.
Ha ha ha. Thanks. Appreciate it 😅😇
Not very artist friendly, but I suppose once you set this up you can keep it pretty much as a preset. Thanks for this, been wanting to explore this further.
Yeah I get it. There might be other more artist friendly Ways to do it. But I did not find them yet.
Hi! cool tut!, is there any difference between this method and using the Sample pos. to UV projection?
Hey there and thank you for the comment.
Sample Position to UVs won´t show up in reflections / refractions etc. correctly.
It will never reflect / refract the right part and always show the part of the background image that would be at the reflections / refractions UV location, not the position the ray is actually traveling.
Thanks for this. Can you explain how the original method wouldn’t work for some VFX shots? What would be the reason for using the octane camera baking in VFX?
Hey there. Yes, of course.
There are situations where you need to bake down your projection to objects that have existing UV sets. Mostly if you want to deform your projection.
Think about a birds eye view video out of a helicopter that you tracked and now reprojected to a ground plane.
If you want to simulate a meteor hit the ground plane would deform from the impact.
With both the C4D and the Octane method your projection would still look as if it was flat and not follow the mesh.
With C4D you are using the UVs for your projection. They are different each frame of the video, because your viewing angle changes.
With Octane the projektion is done Procedurally so you are free to bake down the animation to the existing ground UVs.
After that you just have a UV mapped moving texture on your object. So you can deform your object and the texture (former projection) will deform with it.
Sorry for the long read. I hope that makes stuff a little clearer.
Cheers and an awesome Day to you!
@@SilverwingVFX Thanks so much for your thorough explanation. Your videos and tutorials are actually very helpful and needed. You touch upon a lot of things in cinema 4d and octane that we can't find on the internet. I hope you continue making more!
hmmm, not sure what I'm doing wrong but the FOV math didn't work out for me like this. I followed the steps, and the the projection was correct-- but too small. I had to multiply the math you laid out by an additional 1.43x. So not sure where that comes from. Project size and images all match. I'll keep looking into it.
Thank you very much for your comment.
Maybe they changed something until back then... 🤔
If I have the time I might look into it again. At least you got there somehow in the end 😇
@@SilverwingVFXYep, thanks for the reply! I'll try a totally new project and see what happens in that. I'm using camera data from pftrack, so maybe that introduced some kind of scaling issue? I be sure to comment again when I figure it out.
Is there any way to use this to make the ian hubert method possible in c4d octane? Great tutorial as always btw
If you are reffering to the green screen part yes! Go look up this on UA-cam: Siggraph 2018 Rewind Aaron Sorensen: VFX & Compositing with Redshift & C4D. He shows Ians workflow but just in C4D :)
@@rolf1820 no. im talking about the ian hubert modeling method
I would have to look at how exactly he is modeling. But I guess something like this can be done. However I think it would be more in the side of projecting then converting to UVs, like the 1st method I showed.
I do the conversion from the tags to UVs just to make it more understandable. But this can be also used to fixate the projected textures.
@@prymexxxx oh just apply a texture onto a plane, then use the knife tool to cut out details
the 1st method always produces repeat boundary, i am using r25 and same oc version as you
Thank you very much for your comment. What would be the intended result for you? Eventually setting the "Border Mode" U and V to something else then "Wrap Around" in your input texture node will help 🤔
How can i fixate the projected texture onto the plane UV's?
Hey there.
You have to bake the Projection to the UVs.
You can do that using this technique: ua-cam.com/video/gcJNWtI7ouc/v-deo.html
You need the Octane Native Camera Projection method and good UVs on the geometry you are projecting on.
Just bake the Texture and reapply it as a UV mapped tex.
Unfortunately there is no internal way of doing it on the fly. At least that I know of!
Hope that helps 🙂
@@SilverwingVFX Thanks for tipp this helps alot, also thanks for the fast response glad to have a veteran like u in this community helping out! 🙂
Thank you as usual maestro
You are very welcome!