Questions tagged [light]

Questions about light, lamps, lighting and lighting issues.

378 questions with no upvoted or accepted answers
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11
votes
1answer
1k views

Per-Vertex lighting in GLSL?

How can I achieve per-vertex lighting (like in single/multi-texture shading) in GLSL with all of the other GLSL features (like buffer shadows, texture layers, etc.)? Bonus points if it can be done in ...
4
votes
0answers
164 views

Blender 2.81 Eevee lights clipping through objects when using volume shader

I want to use Eevee to render my animation in Blender 2.81. The animation involves lights behind/inside objects with one side open. When I add a cube to the scene with a Principled Volume shader in ...
4
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0answers
45 views

Determining if Cycles light rays provide direct illumination or self-shadow

I am looking to render Saturn and its rings. The sun illuminates the diffuse material of the rings on their sunlit side but their backlit side needs to have an emissive shader. However the rings must ...
4
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0answers
131 views

Strange light from glass

I'm doing a scene with a room with a table. On the table I have some wine glasses, but I get this strange light from some of them. The glass to the left looks OK, but the other are not OK. It seems ...
3
votes
1answer
37 views

Weird blown out colours in renders eevee

I have a weird problem with blown out colors when I render with atmosphere and bloom. It's weird because I'm rendering a video with 300 frames, and the glitch shows up at about 30 random frames. I can ...
3
votes
0answers
32 views

How can I get shader node values based on object angle?

I'm trying to automatically change a blackbody's value based on a sunlamp's directional angle. When the sunlamp shines horizontal, I would like to have a minimum value represented in the shader ...
3
votes
0answers
964 views

Cycles: realistic light refraction for glass lenses

I found this image somewhere on the Internet: It was made with Cinema 4D and some special renderer. I decided to try create somethings similar using our favourite Blender and Cycles. To achieve a ...
3
votes
0answers
86 views

Light / Mesh inconsistency in one area - Cycles

I'm trying to understand what's wrong with the lights in my scene. I've made some kind of sci-fi corridor, inspired by the interior of an aircraft cabin. The main mesh is first mirrored and then ...
3
votes
0answers
798 views

Why does my glossy object look flat in render? (Cycles)

I've been playing around with cycles, and got a nice glossy material, and it looks good when multiple objects lie next to each other on the ground. But when the objects are in the air, they look flat, ...
3
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0answers
110 views

Howto get BRDF data information in blender

First of all I want to apologize if I may use any vocabulary etc. wrong because I am fairly new to the 3D-modelling world (but I will tried my best to read up as much as possible). What I want to ...
3
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0answers
594 views

How to understand the scale of blender lighting values?

Is there a standard comparison for light power / values in Blender Cycles? What I mean is that under a certain value lights tend to have a weak effect, but over a certain threshold the interplay of ...
3
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0answers
173 views

Lighting a volume with a bi-color point light (2)

This question is a following of this one I would like to light the center of a cylindric volume with a gradient light White -> Red -> Blue radially from the center to the border. I made a test of ...
2
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0answers
16 views

Even light emmission from area light in Eevee?

So I know that emmissions dont interact with volumetrics (fog in my case) in eevee if you don't bake in the lighting, but the emmission planes are going to be moving. I had the idea to use area lights ...
2
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0answers
26 views

Why is the light blowing into one direction?

This is an imported SVG, I used skin modifier for the thickness and Emission shader for the light. But the light is not surrounding but seems having a direction. Does anyone know why it happens and ...
2
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0answers
28 views

Does cycles use the light portal power value?

When marking an area light as a portal, some controls get disabled. However blender still lets me change the power and color of the light portal. Changing them doesn't seem to affect my scene, but I'm ...
2
votes
0answers
59 views

What units of intensity do Blender's lights use?

The "Sun" type has "Strength", but the other types have "Power". What are the units for these lights? Lumens? Lux? Candelas? They all default to 100, so maybe it's a ...
2
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0answers
30 views

Invisible Plane that catches light from emissive surfaces

i am trying to make a lighsaber in blender 2.81 to add to some footage. i am trying to make a light emission from the lightsaber onto a plane directly behind it, but i dont know how to make the plane ...
2
votes
1answer
154 views

Volumetric light without fog

I'm using blender 2.8. I was wondering is there any way to create volumetric light without fog (or just a little bit) ? There are some tutorials on Youtube but almost all of them are creating ...
2
votes
0answers
63 views

How to limit light to a collection? Formerly (2.79) it was 'Limit to this layer'

How to limit light to a collection? Formerly (2.79) it was 'Limit to this layer'. I have a lot of blend-files where I have object and lights in layers and the lights are limited to that layer. With ...
2
votes
1answer
174 views

How to make an object emit light streaks

I'm new to Blender and VFX/3D in general, I'd like to know to make an object emit streaks specifically like the Legendary Pictures (2010) VFX logo.
2
votes
0answers
44 views

What are the correct texture coordinates for a lamp projecting an image?

I have studied the answers to @Duarte's question here, and can't get any of the driverless answers to work, either in recent 2.79, or 2.8. This was after trying my own set-up with a 0-sized point/...
2
votes
0answers
145 views

Toon Shader Programming/Noise Generation/Line Coloring

EDIT: A LOT OF IMPROVEMENTS The file: The output will look something like this (but in color): (Mickey & the ship's wheel are cel objects, and the ship & grass are background objects) CEL ...
2
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0answers
607 views

Eevee avoid light reflections in glass, but only one object?

Im using an area light in Blender, and it is reflecting in the glass of a certain object. Reading other answers, I tried turning specular to zero. Problem is this means it doesn't reflect off anything ...
2
votes
1answer
391 views

EEVEE how to disable background light

I‘m currently having an issue. I want to disable the background light so that objects won‘t be influenced by it. In Cycles this is easy: inside the „Ray Visibility“ option of the world tab you just ...
2
votes
1answer
2k views

Why is my object black in rendered shading mode?

I am quite new to using Blender, currently using the 2.8 Beta Version, and I decided to make a Low-Poly Island from a tutorial I found on YouTube In the tutorial, he added a Light and changed it to ...
2
votes
0answers
470 views

EEVEE light source reflection trough other reflections

Any light source in eevee render reflects itself through anything in front of it. In cycles, this problem does not exist (obviously) Enabling contact shadows Kind of fixes it, but it creates a lot ...
2
votes
0answers
58 views

Light emission sources render as cubes

Just faced such a problem. Have kind of streetlight models in my scene (four instances of them to be exact) with the light emitting parts. Final render appears like this: As you see, all of them ...
2
votes
0answers
4k views

Light Linking blender 2.8

I'm a Maya user and have just started down the Blender path but I've hit a road block when it comes to a light linking option? If I just want to light one object with one light and leave everything ...
2
votes
0answers
222 views

Render between outdoor and indoor

I've some experience with Blender (and previously 3DS Max), but I only do something with this once every year. I have a scene where I want to render somethings outside and other inside, but I am ...
2
votes
0answers
83 views

How to get a correct natural illuminance while preserving the physics correctness of the lights

I read Cycles sun is physically correct (radiant flux at sea-level is 1050 W/m² according to this source). With a clear sky luminous efficacy of 100 lm/W, this should, with the support of a World ...
2
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0answers
216 views

Why does my render change when I add background light?

I was following an Andrew Price tutorial on how to create realistic wood textures in cycles engine. The texture looks good without background light but with it, it looks really white. This is ...
2
votes
0answers
1k views

Can’t find light in scene/why is it so bright?

Ok I have a scene that used to be a darker/less yellow world lighting before I started adding some lights/emissive planes. I wanted to go back to the lighting I had before, so I changed the world ...
2
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0answers
114 views

bpy: light animation from grid

First, I wanted to recreate this image applying also a animation to that. To start, I create this code. ...
2
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0answers
416 views

Problem lighting inside of a skydome

I'm a Blender noob but made it this far. I successfully textured a round sky onto a dome that's cupped over the center of the plane grid, I started from the default start screen (the one with the ...
2
votes
0answers
400 views

I parented a light source to an object, Is there a way to apply a modifier to both?[cycles]

I'm trying to make a street lamp, so i parented a light source (an area light) to the lamp object. The problem is when I add an array modifier to the lamp it only applies on the lamp mesh leaving me ...
2
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0answers
111 views

Scene lighting and setup: how would you get such a render?

Just for fun, i'm trying to recreate a scene from the (nice) movie Cherry 2000. Here's a link to the clip. I like the aesthetic, but I can't figure out how they did setup their scene; and that's ...
2
votes
0answers
808 views

Backlight rim effect on hair in vanilla Blender

Was trying to make a semi realistic head. Felt like the head hairs could use some rim light, so I made the backlight... and now I am stalled for quite a while. This image sums what I mean as ...
2
votes
0answers
515 views

Cycles & Blender Render for God Beams / Crepuscular Rays / Sun Beams

I'm having trouble getting the actual beam of light to show in the render of my image. What I want to do is create an image that looks like this: However, In blender render I am unable to get the ...
2
votes
0answers
136 views

Strange Shadowing on Object with Array Modifier

I'm creating a Map for Garry's Mod PropHunt but having some odd shadowing issues. For example on the supports left and right of the trackbeds: Somehow one of the support array's duplicate has odd ...
2
votes
0answers
237 views

How to render 3D words without lighting?

Some person made a 3D intro video and his render has lighting affects but I don't see the light source in that file. I was wondering is there a way to light up an object without like UV shape emitting ...
2
votes
0answers
594 views

How to make the glare coming from strong sunlight?

I want to create more or less realistic light in outdoor scenes. I read this question Lighting for a outdoor scene in cycles The answer says you should set up the sun lamp properly and use ...
2
votes
0answers
207 views

Why is my Blender Game lighting the same regardless of where I put the light?

I'm making a game in Blender Game Engine and I've come across another problem. If I don't have any lighting at all when I go into game preview mode it shows up lit. This looks very cartoonish and ...
2
votes
0answers
103 views

Is it possible to determine emission shader value by other lights?

Is it possible to take a lamp/sun/point light and use it as a value on the scene to tell materials that are not affected by the light source to emit their own light? This is photoshopped example of ...
2
votes
0answers
1k views

Missing Shadows

I have a problem: In material mode, this little medium-poly Miata casts a shadow on the ground. When I press Render, the Miata's shadow disappears. Is there any way to get the shadow back?
2
votes
0answers
243 views

Yafaray render with hdr image as light gives black and white objects

I've created a modern interior scene with cycles and now I would like to render it with YafaRay. In my original scene I'm using an hdr image as environment texture for the world and as only source ...
2
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0answers
43 views

Modify light source so it will only create highlights and not reach into shadowy crevices?

My model has many protrusions and crevices. I am satisfied with the shadow that currently exists in the crevices, but the protrusions need more highlight to create a sense of volume. How can I ...
2
votes
0answers
522 views

How to get shadows on the ground plane? (Noob)

I'm using Blender Internal. I have a ground plane set as receiving shadows, I have two light emitting planes, both have cast shadows on. I am using indirect lighting to utilize the effect of the light ...
2
votes
0answers
121 views

How do I make lamps effect scene locally only to reduce noise?

I'm trying to achieve photorealistic renders with Image Based Lighting + lamps that should effect the scene locally - only the surfaces around them. In this particular case, the first render was made ...
2
votes
0answers
130 views

Atmosphere appears on the dark side

This didn't used to happen but it seems like a bug I'm not sure. I was messing around with the color ramp of the atmosphere and now part of it appears on the dark side and then cuts off. I haven't ...
2
votes
0answers
712 views

Atmosphere Colour Change (Blender Render)

Just a quick congrats to the moderators who won! Glad to see some friendly faces keeping their spots as you've help so many out including me with this project and others. Back to my Earth project. ...

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