LuxCoreRender Forums

Hey,
i try to build a LED-Channel. I know that the opal cover transmit about 55-60% of the light and the LED-Stripe has 300 lumen/meter.
But in the render looks more like a sun.
Did i something wrong?

Did you use reasonable tonemapper settings?

Did you use reasonable tonemapper settings?

I use always the default settings.

Is there any difference between Gain and Exposure in World->HDRI settings?

If you use real-world light units, you will also need to use real-world tonemapping units.
For a start, you could take a photo of a light source with similar brightness. Then check the ISO, F-Stop and shutter time chosen by the camera, switch the tonemapper to "camera settings", and enter similar values.

About gain and exposure:
final_gain = gain * (2^exposure)

So gain is a linear factor, while exposure is an exponential factor.

Thank you, so is this workflow right?

1. default settings



2. matching LED with tonemapping



3. matching HDRI with exposure setting to match the default setting brightness



4. result in a room looks right?

We had a thread before on this kind of topic:

viewtopic.php?f=4&t=1938&p=24448#p20979

perhaps you find some helpful info there?