V-Ray for Rhino – Quick Start: Interior Lighting

welcome to this quick start lighting tutorial for v-ray for rhino in this video we take a look at rendering an architectural interior with a daylight look open the scene file interior day start dot 3vm found in the downloaded assets from the tutorials web page linked below now the first thing to do is turn on material override to allow us to better focus on just the lighting and to also speed up feedback with the interactive render as we go along and we'll do that through the asset editor in the settings tab like so now if you open the rollout you see you can adjust the material that is assigned to everything with this override there is however a glass material in these doors that needs to still be glass so that it will allow light into the space from the outside first find the material in the material list and it's called glass window neutral go to the settings and scroll down to the options and disable can be overridden there's also a v-ray proxy in the back which is this skin system on the wall and that's a very complicated piece of geometry so I'll disable it so won't slow down the rendering as I test out this initial lighting this is luckily placed on its own layer so open the layers panel if you don't already have it open and under the walls layer disable the skin sub layer like so go to the Settings tab and under render make sure that it's set to interactive render output should be a nice small size like I have it here 480 by 600 and then go ahead and start the render now as you can see this is a little dark and that's because of the default location of the Sun in Rhino it's not letting a whole lot of direct light into the scene so open the Sun panel and in there experiment with some different positions for the Sun also on using 320 for the azimuth and 49 for the altitude now we can go to the camera roll out to adjust the exposure value or evey lower values of course get brighter and a higher value gets darker the default evie value that we had of ten is actually pretty okay for now so I'll set it back to that the next thing to do is to enhance or augment the light coming into the scene using a portal light which is a job for the v-ray planar light we'll make one for each of the three windows we have to augment that light coming in from the environment outside through the glass doors go ahead and stop your render in the viewer a lights tab of the toolbar click on the planar light and then in the front view go ahead and click to start placing the planar light around the glass door like this overlap into the solid part of the door is completely fine so just make sure to place it so that it covers all of the glass in the door then go ahead and place the light on the outside of the window like so now I'll explain why we're doing it this way shortly but for now let's get two more lights placed for the other doors hold down the Alt key and use the gumball to drag out two copies of the planar light for the other doors placing them like so take a look at the asset editors lights tab and you can see that there are three new lights they are individual lights so changing one does not change the other as we have done in previous QuickStart videos but if you would like to link the lights together so that changes to one affects all the others you can use a Rhino group so select all three of these lights in the UI here type in group and it creates a Rhino group so if you select one it selects all three go back to the asset editor and change the settings for one and you'll now see that it changes the settings for all three lights go ahead and start a new interactive render and all elapsed about 10 seconds here and you'll see that the nature of the light is much different that's because each light is using simple values and actually blocking the sunlight from entering the space from the outside but what we want to do instead is to take the environment light and enhance it as it enters the space by using these lights as portals in the asset editor turn on the portal light parameter now the environment is again lining the room through the windows now let's talk about why we put the portal lights on the outside of the windows as opposed to inside the room up against the windows I'm going to drag the three windows inside the room now and you're going to notice this weird kind of shadow line on the edge inside the window frame that's created due to the placement of the portal light so the light on the left side of the shadow is not being enhanced while the light on the right is so basically it creates an unnatural shadow line so I'm going to go ahead and put them all back outside now there are two types of portal lights simple and accurate simple lights will ignore any geometry or any light bouncing or otherwise being affected by geometry and simply pass through an enhanced environment light accurate portal lights do take into account the effect that geometry has on that environment light so let's take a quick look at what that means go ahead and stop your render in the scene you'll notice outside the space has an infinite ground plane that's gray if we go to the asset editor under the material section there is the infinite ground plane material so let's make this something super bright so that the environment light will bounce off of it and show us something very obvious when it comes inside and I'll go with a nice bright fuchsia which is the fancy way of saying pink now I need to make sure that this material is not overridden like we did earlier through the options section of that material now restart the interactive render and you'll notice that the fuchsia color is on the outside bouncing around and hitting this surface but a does not affect the inside at all that's because we're still using the simple portal light in the asset editor go back to the lights tab and modify the portal lights from simple to accurate notice that the fuchsia is now bouncing around inside as well though this can take longer to compute and render so if you don't have anything in the environment that needs to affect the light coming in use a simple portal which I'm going to do here by setting it back in the lights tab then in the material tab set the infinite ground back to gray now let's get back to the Sun I do like the location of the shadows and the light coming through here but the shadows are a little too sharp for my taste so I need to soften those edges a little bit in order to do that we need to change the v-ray Sun settings for the Sun itself which is called the writer document Sun which is under the lights tab in the asset editor the size multiplier is what we need adjusting the value here will make the edges of the shadow softer you can increase the value larger than the slider range by inputting a value like a hundred but it makes the shadows too soft and unrealistic it's best probably to use a value between 1 and 10 so I'll use a value of 8 for some nice soft shadows now let's remember this for final so go ahead and stop the interactive render go to the layers tab and re-enable the skin layer from before to get that feature on the wall under render disable interactive and also disable progressive under the render output adjust the image width and height to be 800 by a thousand then disable the material override now if you have swarm setup like I have to render this on multiple systems you can go ahead and enable that now and then start a render now I will lapse some time here so we can see the final result and now we can click show Corrections control to make adjustments to the render like we in previous videos now I want to make the scene a little warm so let's start with white balance adjust the slider to see the change and we'll end up with a value of 88 11 we also want the shadow to be a little bit cooler so we can use color balance and only select the shadows and I'll use the values negative 0.05 zero and 0.1 then we're going to adjust the color curve the top value I'm going to set around 0.67 0.93 and the bottom value somewhere around point zero nine point one six the brighter areas are a little too bright which we can correct by adjusting the exposure in the exposure section adjust the highlight burn to a value of 0.65 you can find the color Corrections file as we have set it up here as part of the downloaded assets so that you can import them in to see for yourself now let's add a little bloom to the image for a more photographic feel so open the lens effects settings enable bloom and adjust the weight to something that you like I'll set mine to about eleven point three and I'll set my size to twelve point to one and the shape to fourteen point nine eight to get to what I have here and there it is add a light render of this interior space thank you for joining us on this date I'm interior lighting quick start video for v-ray for rhino

Channel: ChaosTV

Views: 144,673

Keywords: #VRay, V-Ray, Chaos Group, Rhino, archviz, tutorial, how to, lighting, shading, interior, design, architecture, software, render, rendering

Id: k1c0Sy0UyqQ

Length: 10min 42sec (642 seconds)

Published: Wed Jul 05 2017