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@norbertz So you don't understand that PM = Private message, so be it. Nowhere did I say that DS users were not up to much. I went the PM route because I figured most here don't want to witness our spat. You seem to want to turn it into a personal attack simply because I didn't agree with your advice in total. As is your wont.
For others that are struggling with lighting using IRay here is some basic stuff that may help. By default there are two light sources in the scene when you start DS. One is the environment lighting, from the default HDRI called Ruins. The second source is from the perspective camera and is known as a head lamp. To turn off the environment one click on the render settings tab (If you cant see it go to the top menu 'window->panes->render settings.) Once on the render settings tab click on 'Environment' then in the panel click on the top option 'Environment mode' and change it to 'scene only' - Now you wont be getting any unwanted light from the HDRI.
We don't want to turn off the perspective headlamp because we need it to set up our camera angle. So now go ahead and use the perspective camera to set up the angle that you want. When you think you have it, create a new camera at the same place as the perspective camera ( top set of central icons, left most icon) but when you create it, choose the option to 'copy active view' - This will create a camera that we can control the headlamp on a bit easier (when we want to) AND if you were to save the scene, this camera will be in the same place when you reload the scene, the perspective camera would go back to its default position.
So now you have the camera in place, you can start to build your lighting. Think about where you want the light to come from. The simplest way to light an interior is to create a primitive-> plane and turn that into an emissive surface using a shader.
Raise the plane so that it is near the ceiling but still in the room of course. Note: The larger a light source is (in relation to everything else) The softer the shadows will be, the smaller the light source, the harsher the shadows will be. So long as that plane is outside the camera view you have a start. You can alter its strength as a light by going to the surfaces tab and changing the emission temperature, and of course you can also change its colour here.
You may want instead of the above to try to create a more realistic render based on any lights that were modelled into the scene such as over head lights or table lamps etc. You can of course select the relevant surfaces of these and turn them into emitters if the vendor has not done so. ( If they are set up to be emitters, check on the surfaces tab to see if the emitter colour is set to black (off) and turn it to whatever colour and strength you want.
Once you want to see how your lighting looks so far, select the camera you created in the main window (using the drop down arrow), and also select it in the scene tab. Now click on parameters and turn the headlamp to off. Now when you render the only light in the scene will come from the ones you have created.Hope this helps and as I say, this is basic stuff but there may be one or two things in there that help. I will do a second post dealing with graininess and fireflies later.
I have seen mention elsewhere that to light an indoor scene you can create a plane, place it by (outside?) a window and turn it into an emitter. Here is why that is incomplete advice at best, and bad advice at worst. First we have to understand how an unbiased render engine like IRay creates the image. It sends out rays FROM light source(s) These rays mimic real life (photons) in that they travel in straight lines unless or until they hit something. When they hit something one of several things will happen. They will either bounce off that something, be absorbed by it, or pass through it and stay on the same course, or pass through but at a slightly different angle (refraction, e.g. water or glass) These rays will carry on their merry way until they either come to the end of their life or use up all of their 'bounces'. Your computer has to calculate these paths for all of these 'samples'.
By default in IRay when you turn a surface into an emitter, it will send light out from both sides, so in the example above if you created a plane and raised it to the ceiling it would emit light both up at the ceiling and down into the scene. So if you use a plane outside of a window, the computer will be calculating rays that are going away from the scene. In the worst case scenario this could double the render time, all other thing being equal.
You can make an emitter only send light out from one side. With that surface selected, on the surfaces tab, you will see an option called 'two sided light'. By default this is set to on, but if you turn it off, you have to make sure you have the 'proper' side of the surface facing where you want the light to go. When you create a plane in DS, the uppermost surface is the 'proper side'. Worth remembering 😉But if you DO want a light shining through a window to light the interior, you are better off using a spot light. With this you not only have better control over the direction that the rays will travel, but you can also narrow the fan so that the majority of those rays go through the window.
Bear in mind what I have said above, each ray has a number of 'bounces' assigned to it ( and/or a path length). If your scene has a lot of glossy surfaces then rays will be bouncing around for as long as their life allows. So to reduce render times you might want to check surfaces in your scene and either reduce their glossiness or increase the glossy roughness. Too many glossy surfaces, or too much glossiness will make it nigh on impossible to resolve the image. Similarly, if you use light sources that are overly bright, you will see things that are known as 'fireflies'. White pixels that have not been resolved or 'converged'. You can turn on noise filtering and firefly filtering to see if this helps.
To do this, click on the render settings tab, then on 'filtering'. Here you will see the options to turn both on.Hope this helps,
@eelgoo NP mate 🙂
One thing I forgot to add for those of you who are having trouble with rendering indoor scenes, get the free render cam from this link and use it. It really does work and will go some way to reducing render times or at least removing some of the fireflies and other artefacts that appear.
I have to thank @I-dont-post-here-anymore for the link and the link is :-https://heroineadventures.deviantart.com/art/Iray-interior-camera-for-DAZ3D-728244344
Rank:
Perhaps I should post 'clearer instructions next time, just for you.
And I can post the rest of your piss taking PM's if you wish, you know the one's where you clearly say DS users here are all in the novice classroom and should be
taught how to crawl before they walk as you put it. What gives you that assumption anyway? Since when did you become the 'Pro' who knows it all huh?Anyway well done for taking the day to read some DS tutorials and post the information on the Zone. Because yesterday you hadn't a clue what you were talking about. And what you've written so far can be found all over the internet, and in video tutorials from DAZ. The one's that have been posted here and elsewhere. And probably downloaded by most of the Zone members.
Have a nice day 🙂
@norbertz " And I can post the rest of your piss taking PM’s if you wish, you know the one’s where you clearly say DS users here are all in the novice classroom and should be
taught how to crawl before they walk as you put it. "Actually I didn't say that but as usual you are taking words of out context and even putting some in that were not there. It was an analogy but I doubt you can understand that, or don't want to because, as ever it suits you to use half truths.
What I said was " I would rather encourage people to try to stand if they are crawling than to try to drive a car or fly a plane 😉 "
And as for " taking the day to read some DS tutorials and post the information on the Zone " are you serious ??? Get a life kid. You troll me with PM's where all you do is insult me and twist words to try to make yourself feel better, I feel sorry for you.
Well, you have achieved one thing, you have made me wonder if it is worth posting anything else to the blog.
Since I have been using the zone I have tried to help one or two people privately and posted stuff that I thought others might enjoy. Oh, and tried to fill two or three spots on the repost thread, why do I bother.
Why don't you guys take it back to PM. You were right @EdnaCloud, we don't want to witness it.
Rank:Er, yes you did. And you assume every DS user here is wet behind the ears and knows nothing.
No, you get a life kid. yesterday you didn't even know DS has an app named GOZ for porting items to Zbrush. Stating why would DS user need to send anything to Zbrush!?! And as for Iray planes, your lack of knowledge about them and how to use them made you look a complete fool. For a self confessed pro that is.
Listen, been here for a while now, seen people come and go, renders posted, tuts posted, questions asked and answered. But I've never come across a condescending kid like you, on any forum for that matter.
If you don't understand what I'm saying you only need ask 🙂
Rank:Because McNab repeats Itself over and over again.
A true Narcissist. McNab is right, everyone else is wrong.Rank:Unneeded and unwanted disagreements have hopefully come to an end.
Peace folks 🙂
@norbertz
Thanks! I'll check out the article! I'm glad to know I'm on the right track. That render came out alot better than the ones before it so I THINK I'm starting to get the hang of this. lolJust takes a lot of trial and error, and when you get a great render, save that scene, record the settings!!! Reference the settings for later scenes 🙂 Shit, once you get a good one, and i've done this too, delete everything except the environment items, such as lights, camera settings, render settings and save that as a preset.
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