Convolution Kernels in UE5

Development Rendering
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1

I’m having an issue with the convolution bloom kernels in UE5, I’ve converted my 4.27 project to 5.0 and under the bloom settings of post processing volume, I have a star shaped texture to effect the shape of the bloom. When enabling the convolution Method the level turns very dark as if all lighting is switched off.
the Bloom settings of post processing volume are as follows;

Method = Convolution
Intensity = 0.15
Threshold = 3.2
Convolution Kernel = HDR image (transparent background with a star shape in white) sorry can’t attach the texture as I’m a new user
Advanced
Convolution Scale = 0.25
Convolution Center = X0.5 Y0.5
Convolution Boost Min = 5.0
Convolution Boost Max = 1.7
Convolution Boost Mult = 12.4
Convolution Buffer = 0.22

2

I have the same problem as you.Kernels not work at all and I have to switch to standard bloom.

3

Hello, use in Convolution Kernel the texture “DefaultBloomKernel”, then enter the DefaultBloomKernel texture and in settings increase the brightness to your liking (Do not exceed 3.0), and save the texture. Adjust the Convolution Scale values to your needs, as well as the intensity. Use the Default values of Convolution Center and Boost. Your lighting should now work correctly.

image
image712×1080 51.9 KB

5

This document is available at Bloom in Unreal Engine | Unreal Engine 5.3 Documentation