Unreal 4 Lighting Academy....or something like that ;)

Development World Creation
307

yipee!!!

308

Alight…its here! :smiley:

Cheers! :slight_smile:

309

The calculator you are using to convert from lumens to candela is giving you “mcd” (millicandela) as it’s unit which is why you are off by a factor of 1000. If you want to convert a spotlight from lumens to candela you also have to double the outer cone angle for the correct value to enter as the “apex angle” (abstrahlwinkel in the german formula you used).
Calculating like that my lights seem to match up when switching from candela to lumens, so that part of the math appears to be fine(point light:1500 lumens -> 119 candela, spot light:1000 lumens 20°cone angle -> 2639cd).

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@

When you say its the last lighting academy, you mean for this particular series right? You will continue to make more?

Edit: Nevermind! Watched it to the end, top quality video as always!

311

OMG. Thank you very much dear ** **for this video. I am so depressed now. :frowning:

312

Can’t wait for the next video :smiley:

313

Hey !

Loving these videos, in the latest video you had issues where all your metals appeared black, I too had this issue, and resolved it by increasing the brightness of the sphere reflection captures, I have no idea if this is Physically correct but might be a fix in the mean time.

314

Hey man!

yeah I tried that too…but as you see in my scene, I also have that glass statue and the reflections have the correct brightness on it. So if I multiply the reflections up, the glass will blow out. So no matter what, something seems to be broken :frowning:

Cheers!

315

Agreed, This also Kills Clear coat materials as well… ;/

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Its comming guys! Session is recorded and uploading tonight!

LA_02.jpg
LA_02.jpg2048×2048 270 KB

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And here it is :slight_smile:

Cheers!

318

Hey man,

I watched your Broken Physical Lights episode and wanted to give it a go but couldn’t find the same HDRi from the website you mentioned. Any changes you can point me to it?

And thanks for the continuous work here. Very appreciated!

Edit: Found it! :slight_smile:

319

So first of all - thanks for videos :slight_smile: I learn so much…

In a penultimate video, you say candelas does not equal to lumens if you are using the right conversion numbers
however in 4.19.2 and 4.20, I’ve got a normal light with lumens and candelas. They equal in terms of light
there’s video test by me - - YouTube

hope I don’t miss the point of that issue with light

320

Yo!^^

Sorry for the long silence! I am on vacation until the end of the week and I pretty much took my time off from everything :smiley:

Regarding your question though, we figured out via the comments that the converter I was using was actually doing some things wrong/I was to stupid to set it up correctly :smiley:
So the units DO make sense relative to each other :slight_smile:

Cheers!

321

is it possible to provide us with the shader of the skydome in a text file from which we can copy and paste it into the matrial editor in our own scenes? Would be really helpful
Thank you very much in advance for doing that.

322

Sorry man, I don’t do such things as this would defy my approach of making tutorials in the first place! :slight_smile:

I want you to dig an learn, no copy paste here!

Cheers!

323

Thanks for the great videos! Keep up the good work!

324

First of all thank you for your tutorials, they are really super useful! I’m experimenting with skydome shader you showed us in last tutorial and I have some question -
Is there way to fix seam on sky? I debug my .exr and sphere UV. They perfectly fine. Then I started debug shader but my knowledge is not good enough so I can’t solve this problem. It would be cool if you have any solution :slight_smile:

325

Thank you for the videos! I’ve learned so much, and I’ve been watching from about the start! I wanted to ask in this thread if anyone else has encountered a host of issues when trying to replicate the physical lighting set up outlined in your video. It seems as though most of the view modes break completely, many aspects of the UI vanish (such as the foliage painter, even the rotate gizmo) and as noted by another poster, metallic surfaces and reflections seem totally broken. Is this just me or is everyone experiencing this?

326

Hey,

I am not sure if some of the issues you mentioned are problems for everyone, but some of the broken viewmodes can be fixed by turning on pre-exposure.

Personally, I dont really recommend using the physically based settings for now as they are usually more confusing than helpful for most people…so there is that as well.
There is a thread in the rendering section about the issues with physical values, but I am sad to say that it has neither received some long overdue love nor attention from Epic. Although Tim Hobson just recently picked up on it again and we might be able to get more clarification and more importantly, fixes in the new future :slight_smile:

Something entirely different:

I was on vacation and shortly after that parental leave…so I took quite a long time off and didnt really do anything for the Lighting Academy! I am sorry for the long silence, but I had to take some time off and recharge the batteries^^

There will be more Lighting Academy in the coming weeks, I am just not yet sure when exactly I am going to record again, but its definitely NOT over :smiley:

Cheers everyone! :slight_smile:

Daedalus