Light coming behind a door
polycounter lvl 7
Hey guys,
I'm new to UE4 and I'm having big problems lightning this scene. I need to make a light shine through the door down the corridor so to make the blood stand out. Also I need the ceiling lights cast light and that doesn't seem to be possible with emissive maps. I used a skylight and some sphere reflection capture to even out the light. But nothing still looks convincing
On any other 3D application I would use an area light for this effect. Instead I had to use a spot light with an almost 90º angle, cause I really have no idea how to do this.
Any help and criticism would be welcome
I'm new to UE4 and I'm having big problems lightning this scene. I need to make a light shine through the door down the corridor so to make the blood stand out. Also I need the ceiling lights cast light and that doesn't seem to be possible with emissive maps. I used a skylight and some sphere reflection capture to even out the light. But nothing still looks convincing
On any other 3D application I would use an area light for this effect. Instead I had to use a spot light with an almost 90º angle, cause I really have no idea how to do this.
Any help and criticism would be welcome
Replies
"Larger radius lights cast softer shadows (like area lights in most major 3D authoring packages). Since this is being processed by Lightmass, only Static lights will gain the effect."
You will, of course, need to bake lighting for that.
If you need it more realtime, you may be able to fake an area light with a grid of point lights. I used to do that back in the day when I didn't want to wait hours for a raytracer to figure out an area light.
Thanks a lot! Is it less expensive to do a bunch of point lights than one area light? I didn't know that
Yes a bunch of dynamic shadow casting point lights will be way more expensive than baked lighting, even of those same point lights. I'm not sure how it compares in a deferred setting, but its still going to carry a cost.
Also if you need the ceiling tiles to emit light, you're going to need to put some lights there. There was a feature for a while where textured geometry could emit light, but it has since been removed since it didn't work to Epic's satisfaction.