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Rob Ainscough

Bloom Adjustments

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I was experimenting with bloom values as P3D's HDR seemed "over bloomed" to me, especially at night where I couldn't read letters on lighted switches.

 

So here is what you need to change:

 

[YourP3DMainFolder]\ShadersHLSL\PostProcess

 

1.  Backup the file HDR.HLSL

2.  Edit the HDR.HLSL (notepad)

3.  Edit these lines (starting at 10-13)

 

Default lines

static const float BloomThreshold = 03.25f;
static const float BloomMagnitude = 03.75f;
static const float BloomBlurSigma = 0.9;
static const float TimeDelta = 0.2f;
 
Edited lines:
static const float BloomThreshold = 03.50f;
static const float BloomMagnitude = 04.00f;
static const float BloomBlurSigma = 1.4;
static const float TimeDelta = 4.0f;
 
4.  Delete the shaders folder located: C:\Users\[Your UserName goes here]\AppData\Local\Lockheed Martin\Prepar3D v2\Shaders -- i.e. C:\Users\Rob\AppData\Local\Lockheed Martin\Prepar3D v2\Shaders
 
Here are results (warning very large images 3840 x 2160) ...
 
Default:
 
With my changes:

 

BloomBlurSigma seems to have the most impact ... the TimeDelta is just how long it takes one's eyes to adjust to change in light conditions, 4.0f means less time, 0.2f means more time (effect lasts longer).

 

Cheers, Rob.

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