Sunset simulation using VRaySky and VRaySun

18 Mar, 2015 Ilshat
18 Mar, 2015 # Re: Sunset simulation using VRaySky and VRaySun
Hello! Who knows how to make the evening atmosphere of dignity and manipulating Skye? The question in the screenshots 🙂

18 Mar, 2015 Denis (3d modeling expert)
18 Mar, 2015 # Re: Sunset simulation using VRaySky and VRaySun
Hello Ilshat. Why do you correctness of color!?. After a bunch of sun-sky behave the same as in reality. When Evening or morning, what do you observe when you look at the sun and sky in the real world? The sun goes down closer to the horizon, when the Evening or rises from the horizon, if the morning, just as the sun and the sky runs in 3d max. Lowers its sun close to the horizon. Without fanaticism, of course Try to change the values ​​and do renderings😉.

18 Mar, 2015 Ilshat
18 Mar, 2015 # Re: Sunset simulation using VRaySky and VRaySun
The result of color without the correctness 🙄

18 Mar, 2015 Denis (3d modeling expert)
19 Mar, 2015 # Re: Sunset simulation using VRaySky and VRaySun

Ilshat initially I did not describe in detail the behavior of the sun, so you did everything a little differently than you wanted.

Let's analyze everything in order.

I did not write to you earlier that the important effect on the sky map is what the scene has to do with the horizon. I will use the 3d Max 2009 in the example, for clarity there is a compass with the sides of the light in the corner of each of the views. Pay attention to it when you read this post and compare it with the sky map and then you will understand what is happening in the real world and how it should be in a virtual environment. I deliberately reduce the luminosity of the VraySky card so you can analyze how it behaves as it goes.

First of all, look how I have a scene with respect to the compass, or, more precisely, I need to look at the windows of the room where they go. Our result should simulate morning, afternoon and evening lighting options. For example, I made a couple of screenshots where it is clear that if the windows go north, the sun is behind our window and we do not see it:

Since we need to see the sun and the beautiful light from it, it is necessary to orient the room, the window to the south (south). The changes are clearly visible in the Top view:

The sunrise, in the real world, is taking place in the east (east), and as we continue for the whole day, we go west (west), going into the sunset. Also, as the movement progresses, the height of the sun also changes, that is, it describes a curve that repeats every 24 hours. This screen shows this well:

We are interested in the interval when the sun rises, goes into the daily high and then goes to the sunset.

On the Top view, this will be the lower part of the compass and the movement will pass along the line east-south-west, as there will be sun changes in altitude and when there is a daily maximum the sun will be on the south side and will be high from the horizon - this will be the day.

Now I'm back increasing the intensity of the sky map, in order for my rendering to look as it should and there was enough light in the scene. I'll try to imitate the morning. I move the sun to the east and lower it closer to the horizon, I render:

The test render shows that the sky map of VraySky has changed and resembled the morning sky, as in the real world, and the room was filled with morning tones from the sky map, so we got the light of the morning sun on the right wall of the room.

Now I'll try to make a day. I move the sun to the south, lift it above the horizon and do a test render:

The scene is rendered with a good bright sun on the floor and daylight in the room.

Similarly, now you can easily get a sunset with a beautiful glow map of the sky. Adjust the position of the sun relative to the compass and adjust its height. Everything is not so difficult as it seems at first glance, you just need to properly tune the scene, and the bunch will do the rest for you.

Experiment, and do not forget to share the results.

18 Mar, 2015 Ilshat
20 Mar, 2015 # Re: Sunset simulation using VRaySky and VRaySun
Hello long I suffered because he could not understand why the sun can be seen only in the (S) as the output from the horizon such as on (N) can not see it or Sranan I did not understand: | Well Karch nahimichil here in this here could only do so and would like to here as in the photo with a tree here that would be such a light filled the room with such rays 🙂 I came to the opinion that it is a parameter of the sky and the sun as it is impossible to have yet something add 🙂 and if there is one possibility would have one eye on the master class spy 🙂 if something goes wrong, not strictly judge simply fooled learning 🙄 and I photo by shamans and I came out a moment whether it is possible with Photoshop color code how to translate something in 3d max and here is the photo that inspired me 🙂

20 Mar, 2015 gus_ann (3dsmax vray expert)
20 Mar, 2015 # Re: Sunset simulation using VRaySky and VRaySun

Ilshat, hello.
Well, what kind of master class can there be? Everything is very simple. 😁

Do not be attached to the sides of the world. They do not affect how the sun and its light behave. Only the position of San in the sky influences. If you look at the picture of the movement of the sun in the sky over the day, which Denis cited as an example, you can see that this is a blue glow in the daytime, and this glow changes to yellow in the evening and in the morning. And the yellow glow is the same regardless of sunset or sunrise. That is, the closer the solar disk falls to the horizon, the yellower the illumination in the scene.
If we talk about interior lighting, it is important that the sun was in such a way that its rays hit the window. like this:

If the rays do not get into the window, and the sun is on the other side of the room, then the sky map turns its "dark" side to the window accordingly, and this scene illuminates the scene. (Somehow it was ambiguous😁😁😁)
Like this:

Do you see how much darker the room is? There is no sunlight either. Settings of the sun and sky are the same in the first and second cases.
Now return the sun to the side of the window and move it below to the horizon.

So we got the yellow light (sunset or sunrise). Since the sun is very low, direct sunlight can not get into the window, so we do not see sun glare.

Do not like it that way? Well, you can do it differently .... Max version 2014. Put the sun just above the horizon. Go to its modifier and wind the color of the Filter Color. I specially made a bright color for clarity.

It turns out now that the color of the sky does not correspond to the orange glow. So we need to substitute a sunset orange sky background for the window. That's all. 😉

18 Mar, 2015 Ilshat
20 Mar, 2015 # Re: Sunset simulation using VRaySky and VRaySun
Hello Color Filter Color is a good hint 👌 Well, I immediately came to the opinion of no where, without Photoshop 🙂 The result will comment if Bo was cool 🙂

20 Mar, 2015 gus_ann (3dsmax vray expert)
20 Mar, 2015 # Re: Sunset simulation using VRaySky and VRaySun
Yes, indeed, these things are done with the help of 2 d editors. In the 3 D Max, too, can get more acceptable results. To do this, find the sunset and lighting HDRI scene to her. To post a directional light effect, you can use the fog, which had previously been necessary to put into the container the Gizmo, well .... so much more you can think of. It would be the desire and time to do it ....

18 Mar, 2015 Ilshat
20 Mar, 2015 # Re: Sunset simulation using VRaySky and VRaySun
the main thing that all this is realistic it looked, well, do not overdo it, and vice versa, shorter wholesale and keen eye 🙂

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