Chaos Corona for 3ds Max > [Max] I need help!
Photometric lights are much dimmer than corona lights?
Aram Avetisyan:
Here is the scene I created, you can take a look at the light properties and how things are set up.
Hope this helps.
Jpjapers:
--- Quote from: Aram Avetisyan on 2023-04-06, 15:47:22 ---Here is the scene I created, you can take a look at the light properties and how things are set up.
Hope this helps.
--- End quote ---
This is not a gobo. A gobo is a pattern disc that filters the light into specific shapes. Youve set up a volumetric light environment effect.
https://en.wikipedia.org/wiki/Gobo_(lighting)
What youre proposing isnt really an answer to what we are talking about. This isnt a true volumetric effect nor does it work with gobos in the projection map slot. A gobo will affect the shape of the volumetric rays which unfortunately this doesnt do but putting a photometric light through a corona volume material DOES do. Its just that the intensity is then broken. Ive put in a feature request that explains more.
Aram Avetisyan:
--- Quote ---I need to be able to create a gobo projection effect so if theres a way i can do this with corona lights in absence of an actual projection slot on the corona light, that would be great.
--- End quote ---
This was your initial request, wasn't it?
It would be better if you were specific and detailed enough for what you wanted to achieve.
I have provided a way to create the colored volumetric effect from the video above, which you somewhat liked, and it seemed that was what you were going for.
The sent scene uses Photometric lights, which have option for projection map option.
Weren't you aware of it?
So, you can use standard lights, which have Projection map option, with Corona, with CoronaShadows.
You can get somewhat close results with IES and real volumetric material, but remember that there will be issue with render times.
See the image attached, is this what you are looking for?
If yes, use the Projection map option advanced effects menu of Standard lights.
Jpjapers:
--- Quote from: Aram Avetisyan on 2023-04-06, 22:17:50 ---
--- Quote ---I need to be able to create a gobo projection effect so if theres a way i can do this with corona lights in absence of an actual projection slot on the corona light, that would be great.
--- End quote ---
This was your initial request, wasn't it?
It would be better if you were specific and detailed enough for what you wanted to achieve.
I have provided a way to create the colored volumetric effect from the video above, which you somewhat liked, and it seemed that was what you were going for.
The sent scene uses Photometric lights, which have option for projection map option.
Weren't you aware of it?
So, you can use standard lights, which have Projection map option, with Corona, with CoronaShadows.
You can get somewhat close results with IES and real volumetric material, but remember that there will be issue with render times.
See the image attached, is this what you are looking for?
If yes, use the Projection map option advanced effects menu of Standard lights.
--- End quote ---
My request was for gobos in projection map slots yes but specifically with corona lights because of the issues with both the standard light (no IES Support, no physical light units) and the photometric light (Intensity is broken when used with corona shadows). I believe the use of the term gobo is specific and detailed enough because its a very specific lighting term. Theres not a better way of saying it other than gobos in corona lights but apologies if it was unclear.
Yes i was aware of the projection map slot in the standard light and its doing a sort of OK job for maybe some sort of quick previz but its far from good in my opinion. It doesnt provide a good solution because of the issue i originally noted where you have to eyeball the light intensity but it also doesnt support IES.
So the choice i see currently is either;
Fake volumetrics on a standard light with a post-process effect and you have to eyeball the intensity using the scene units multipler. You also cant apply an IES which is integral for stage lighting. No supplemental GI from the volume rays.
Or
Real volumetrics with a photometric light and an IES where you still end up needing to eyeball the intensity of a photometric light because despite using physical units, its currently not physically accurate when using corona shadows. You also have to play with the tiling of the projection map to get it to display the right size for the 'aperture' of the IES.
I don't mind the render time penalty for accurate-looking atmospherics with stage lighting. I just would like to be able to do them with a corona light where i can be certain of the physically correct light intensity as per my specifications, and can be certain that the volumetric ray effect will match the projection pattern. The best option in my opinion would be native support for projection maps in the corona lights which removes the need of compounding fake upon fake upon fake to achieve a filtered shadow on a volumetric ray that is somewhat accurate. There are requests for this exact feature dating back to 2013 but i have created other request today to reiterate the need.
I have attached a quick render demonstrating why none of the currently available solutions are accurate or provide all of the features required for any kind of physically based results with gobos and volumetric rays.
Basshunter:
Jpjapers original request was for a gobo projection with Corona lights.
I seconded his request and added that this had been requested many times for many years now. Also mentioned how great it would be to have specific options to create stage lights which is part of my everyday job. These options include gobos, focus, falloff, etc, like in Blender's video.
With current Corona light is not even possible to recreate a proper moving head beam effect.
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