<p>Not sure what sort of lightmaps are produced by blender. Perhaps if you can get it to render a non-transparent lightmap (for example one that has all the colours you want but on a black background), you could then use a program to remove all of the black. I believe GIMP and Photoshop both have a colour to alpha tool. Be sure to pick a background colour that will not be the same colour as any of the lights.</p>

CC BY-SA 3.0
2017-12-17T22:08:49.800Z
2017-12-17T22:08:49.800Z
Chuck
<p>So I have this racing game I'm trying to modify that uses lightmaps that fade to transparency for light sources. An example from the game:</p>

<p><a href="https://i.sstatic.net/9SLZM.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/9SLZM.png" alt="enter image description here"></a></p>

<p>I've been trying to produce a similar effect but with no luck. I've tried blender but that doesn't support transparency off of light sources, if anyone has any program ideas I'd greatly appreciate it! </p>

<lighting>
What program can bake transparent light maps?
nathan miller
# What program can bake transparent light maps?

(Asked by: username_0 on 2017-12-16)

So I have this racing game I'm trying to modify that uses lightmaps that fade to transparency for light sources. An example from the game:

[![enter image description here](https://i.sstatic.net/9SLZM.png)](https://i.sstatic.net/9SLZM.png)

I've been trying to produce a similar effect but with no luck. I've tried blender but that doesn't support transparency off of light sources, if anyone has any program ideas I'd greatly appreciate it!

**Tags:** lighting


---

## 1 answers

### Answer by username_1 on 2017-12-17. Score: 0 | Accepted answer

Not sure what sort of lightmaps are produced by blender. Perhaps if you can get it to render a non-transparent lightmap (for example one that has all the colours you want but on a black background), you could then use a program to remove all of the black. I believe GIMP and Photoshop both have a colour to alpha tool. Be sure to pick a background colour that will not be the same colour as any of the lights.


---

