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I have been working with a blender file for a few hours with no issues. Then all of a sudden, I noticed the the lighting had changed in the Modelling view. I went to check how it came out in a Render and the render is completely black, with some tiny white dots which seeem randomly placed like stars.

The scene looks like there is a load of ambient lighting still there when I disable the sun effect in the World tab. Yet despite the extra ambient light (which I don't want) AND the sun clearly shining away in all of the edit views, the render is black and I can't work out why.

I will post a screenshot and my Blend file below:

enter image description here

Here is my .blend file: http://files.staging.x-rm.com/nick/house6.zip

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Check your Scene settings, you've chosen your house as Camera, select your camera instead. Selecting another object than a camera may be useful sometimes to see what an object is pointing towards (for example select a light and press Ctrl0):

enter image description here

As for the light, it's your world that lights up your object, open a Shader Editor, switch to World and see, you have a Sky Texture plugged into the Output.

enter image description here

If you don't want the world to light up the scene you can unplug its nodes or play with its Ray Visibility settings:

enter image description here

Edit: Additional edge loop in order to sharpen your roof (but Subdivision Surface modifier doesn't seem necessary here, it is supposed to round the shape with virtual subdivisions):

enter image description here

To get a proper displacement for the material called Pantiles you need to unable Material > Settings > Surface > Displacement > Displacement Only. But as your topology is not very good the Subdivision Surface modifier subdivision won't be very good either, you'd better rework the topology a bit so that it is made of regular square faces:

enter image description here

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  • $\begingroup$ Thanks! That fixed rendering. Any idea where the extra ambient light is coming from? And how can I send you a tip / beer money? :) $\endgroup$
    – NickG
    Dec 31 '20 at 12:41
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    $\begingroup$ ithe world is lighting up your scene, see my edit ;) don't worry for the beer $\endgroup$
    – moonboots
    Dec 31 '20 at 12:51
  • $\begingroup$ Fixed! Looked like the sun was OK but I'd set the "strength" of the actual image too high. $\endgroup$
    – NickG
    Dec 31 '20 at 14:30
  • $\begingroup$ Do you know what's causing this "sail" at the junction of the walls? Have I missed setting a crease somehow? imgur.com/a/0Jf4gQj $\endgroup$
    – NickG
    Dec 31 '20 at 14:32
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    $\begingroup$ actually you don't have any light for the moment, you must be talking about the world background strength, and if you decrease it it will darken. For the curve, it's because you've given your roof a Subdivision Surf, I don't why as for the moment it doesn't seem to be necessary. You've created creases in order to sharp the edges, I'm not too familiar with these kind of tools, I prefer to have a clean mesh with additional edge loops if I want to sharp edges, but again here you don't need Subdivision Surface or creases. If you want to keep them for some reason, then add an edge loop (see edit) $\endgroup$
    – moonboots
    Dec 31 '20 at 14:39

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