How to exclude HQ lightmaps from cooked build

Development Pipeline & Plugins
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1

Hi,

Our Android build only uses LQ lightmaps, not HQ ones. How can we avoid cooking these in order to reduce cook time, save disk space, and (possibly) reduce run-time memory usage?

If we need to modify C++ code, that’s OK, as long as we are given a hint.

2

Hi! Assuming you have different lightmap directories (LQ and HQ), you can set the HQ lightmaps directory to be excluded in the build by going to Project Settings → Packaging → Directories to Never Cook.

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3

Thanks for the suggestion. However, lightmaps are not stored like regular texture assets are. They are stored in the <levelname>_BuiltData.uasset files that are generated by building lighting, and both LQ and HQ lightmaps are stored together in there.

4

Hi Dan,

Unfortunately, excluding HQ lightmaps from the single BuiltData asset is not supported. We will consider this for future Feature Requests.

Best regards.

5

Hi Dan,

A quick way to get these excluded would be :

`bool FAndroidTargetPlatformSettings::SupportsFeature(ETargetPlatformFeatures Feature) const
{
switch (Feature)
{
case ETargetPlatformFeatures::Packaging:
case ETargetPlatformFeatures::DeviceOutputLog:
return true;

case ETargetPlatformFeatures::ShowAggregateDevice:
return false;

case ETargetPlatformFeatures::LowQualityLightmaps:
case ETargetPlatformFeatures::MobileRendering:
return SupportsES31() || SupportsVulkan();

case ETargetPlatformFeatures::HighQualityLightmaps:
return false; // add this`In AndroidPlatformSettings.cpp.

Best regards.

6

Thanks. I tried this, although it made zero difference in the obb size. Do I need to delete any existing cooked content first before packaging?

7

Even after deleting Android cooked content under our Maps folder, the obb size remained unchanged.

8

Hi Dan,

It appears HQ lightmaps are only supported on Android if bSupportsVulkanSM5 (i.e. Support Vulkan Desktop [Experimental]) is enabled. If you didn’t have this setting enabled, then the HQ lightmaps were already excluded from the cooked data.

Best regards.

9

Thank you for the info!