3d Max Vray Ies Light how to#

A bad cheat would be to make it the same green color you get where it’s supposed to be beige, and then hue it slightly over on the cool side to get a warmer tint in the scene. Try setting it to custom color and then making it white. What’s your white balance settings set to? Don’t think that can cause green tints but worth checking out.

3d Max Vray Ies Light how to#

I found a tutorial on how to set it up below: Would think the common practice is to use the dedicated VRayIES light or the photometric light. You are using the IES in a domelight? I’ve never heard of anyone doing that, but then again I’m not that experienced, again. I still don’t know exactly how your lights are set up. My head is starting to hurt now.Personally I’m not experienced enough to just say “this is how to fix it” here, but I know a lot I would attempt in order to fix it. So you still have to model additional lights, to get vray to render them as visible light sources, but you want those sources to use data from the IES, in order for them to render more physically accurate results, especially in the area of bloom / glare Which is not making the shape defined in the IES file visible, but using a visible light shape (rectangle or circle), which can be made visible/renderable, and using said distribution for brightness data from the IES file, so that the light, changes in brightness, (also affecting glare and bloom) dependant on the angle it is viewed from. So since Corona cannot render that data as a visible area light, as you said it ' uses the distribution for brightness when you define a shape', so you should do the same with V-Ray and what you want is for V-Ray to use that data, same way as Corona does. So V-Ray would obviously need the user, as it does in Corona, to model said light shape (rectangle or circle), to make use of said data in the IES file, as Corona does. Thanks for the examples and the more thorough explanation This hack would not be necessary if v-ray would have an option to render the IES light areas with direct visibility. Since IES lights are visible in specular reflections you can look to the scene via a mirror with a glossiness < 1.0, here i used 0.98 and turned fresnel reflection off. With a trick it is also possible in v-ray, but this is not preferred as it converges slowly:

Both lights were set to the same intensity. The 12 degree becomes much brighter as the light is mostly emitted in that direction. When looking head on, the right picture, you can see Indeed corona does not read the shape and intensity from the IES file, but it uses the distribution for brightness when you define a shape.īelow two IES spot lights, on the left in each picture a 12 degree beam angle the other a 60 degree angle.

Let me show you a few examples, as i like a challenge: V-ray also reads this information and uses it for soft shadows and you can set it to also use it for illumination, but you cannot use it for direct visibility (what i want). Luminaires and other light sources, it is useful in calculating average luminaire luminances and modeling the luminaires as homogeneous area light sources. Luminous Opening Dimensions (Identifier Line 10) While the term 'luminous opening' is somewhat ambiguous for many architectural Here is a descri ption of the IES format: .pl/kw/iesna.txt While I would love to have Vray set up a visible light source, when using IES files, to save me creating them separately, I still cannot find any mention of example of the visible light source, being rendered by any of the mentioned render engines. If you can demonstrate using example images, from Mental Ray, IRay, Corona, to show them doing what you say, then by all means I would be interested to see and be corrected at the same time. I don't know Metal Ray or IRay, however I have yet to find an example of an IES file rendering in any way other than generating the distribution / pattern of light, stored in the IES

the only setting other than the IES files used, that I can find in Corona, is the use sharp pattern or whatever it is called. While Photometric lights, such as those used in Max can be made renderable and photometric lights can indeed use IES profiles, similar to the way corona does things, I am pretty sure the shape and visibility of the actual light, doesn't come from the IES file itself and has to be created by the user.Īs I said, I could be wrong, I am not expert. Perhaps you could show us how it is done, in any of those. I may be wrong but I have never heard of Iray, MentalRay or Corona, being able to render the physical light shape from the data stored in the IES file. You also need to know the value of the light (IES) to get an accurate value etc etc. From what I can find out, in the above thread, corona doesn't generate a visible shape, from an IES file, you have to create the disc or plane (rectangular) light, to which you attach the IES file.