Lights in Rhino do not look good

I have no lights in the student version of the Enscape unfortunately.

Maybe someone knows what the reason is? I have spent money for it anyway.

The lights in Rhino do not look so nice, does anyone have a tip for this?:-/

Hi Jennifer,

Unlike the SketchUp version of Enscape, Enscape for Rhino does not have separate light objects regardless of student/commercial version.

However, I recommend that you use IES profiles with the Rhino lights, change the color of the lights to be a warmer temperature like 3000 Kelvin, and play around with the intensity of the lights in relation to your Enscape exposure settings.

IES profiles are available in free online collections and from most lighting manufacturers.

Hope that helps, if not, can you please elaborate on what you mean exactly when you say that the Rhino lights don’t look nice?

Cheers!

It somehow makes the environment around it much darker although it was actually bright ;/ can you tell me where to insert EIS at lights exactly?:confused: which site can you recommend me?

Thanks a lot!

Ahh I see, this means your lights are too powerful in the foreground. The exposure is unbalanced. If you reduce the light intensity and leave auto exposure on, playing with the percentage value, your background should become brighter as your lights reduce in intensity.

Not sure of an IES site but I’ll shoot you my go to pack of IES files when I’m at my computer again. They are lightweight file sizes.

EDIT:

I actually just realized that Rhino doesn’t natively support IES profiles, therefore Enscape does not either (thought I think V-Ray for Rhino does…) Sorry to mislead you on the IES profiles. The information about exposure still applies and that’s where I would recommend you spend your time adjusting the lighting.
@Jennifer_Koziollek attached are the .IES files I mentioned
IES_Files.zip (95.7 KB)

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Hello Michael,

I have been searching, looked in the 1/17/23 User’s Guide etc. but have not found any information on setting a light’s temperature. I would not be surprised if I am simply missing the documentation. But if not, then along the lines you suggest is I imagine the way to go. I guess if it is valid and feasible to set up a reference image > material or map to a basic shape and then try to match Rhino lights to it. I have no idea if this is even remotely conceptually sound. Well, any thoughts on the matter appreciated.

Thank you,

Andy

Hi @litwinaa ,

I don’t know if you can explicitly set the kelvin temperature like you can in other programs but a general rule of thumb to fake it is by working with HSV color slider, setting a orange/red hue, and then adjusting the Saturation between 0 to 1 to represent an approximation of the kelvin scale of typical light sources you would encounter.

0 would be full daylight “White”
1 would be candle light/fire at 2,000-3,000 Kelvin
around .25 will be close to soft white
around .75 will be close to warm white
etc.

This article is a decent approximation:
https://planetpixelemporium.com/tutorialpages/light.html

I typically set my render scenes to an overall “cool” tone of 15,000K (In Enscape, other programs vary) and then set my interior lights to their respective “color” temperatures. I almost never use white light unless the light source is specifically bright white like in an OR or industrial application.

3000K gets used quite often. And when the rest of the scene is color balanced at “white light” then mid day sun and overall scene will be cooler, more natural looking particularily when juxtaposed against artificial light that is warmer and “cozy” for lack of a better word.

In my experience, it is easier to warm up a scene after the fact but harder to take the warmth or “brown” out of a scene if it started out too warm to begin with. It varies of course…

Perhaps all this will help, I do wish there was an explicit way to set the kelvin temperature @Gijs .
Is that something that exists or possibly may exist?

Thanks!

Hello Michael,

Thank you. Quite helpful / informative. Somewhere ? in the midst of reading your post & link the “sun” entered. And what do you know; I “discovered” the *.rsun file. And a re- acquaintance with [maybe from high school, but certainly not much later after words] Black-body radiation. So at this point, wondering if by using a geographic reference point and the Rhino sun settings one could save a *.rsun file that has a particular color temperature? I would imagine the Sun Animations are programed with color temp. info. to ?

Thank you,

Andy

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Hi Andy,

Honestly I have never used the Rhino sun for rendering as I render in third party programs outside of Rhino but typically the kelvin temperature of the sun is adjusted based on the suns azimuth to simulate the effect of the sun being lower in the sky resulting from light scattering across the “longer path of travel” in the atmosphere. The more perpendicular to the ground plane, the more white the light is as there is less scattering happening, the lower the sun angle is to the ground plane the lower the kelvin temperature it would go.

This could be achieved using a scalar value to control the HSV S value based on the angle between the sun vector and the ground plane or world z.

I do not know if Rhino sun accounts for this, I would hope it does but not sure. Perhaps someone else on here knows the answer and hopefully it’s simple or built in

Hello Michael,

Yes, your suggestions are good ones. For one, the “we do not know how to set the color temperature in Kelvin but maybe someone else does” Like : @Gijs

[quote=“Michael Vollrath, post:6, topic:161939, username:michaelvollrath”]
@Gijs
[/quote]"

In particular my interest is in working towards a “photo realistic” or better -model that is eventually an AR / VR one that is just a close as possible to the material piece of jewelry that a potential customer would be looking at. An amppication that I believe you are working on is the iRhino 3D that perhaps could be one platform / technology for the final model. I imagine some sort of Ray Tracing engine would be needed. Maybe Gitz de Zward will “chime in”?

Thank you,

Andrew