This is the cubemap used when creating a new game.

How they were generated

Requirement: texconv.exe from https://github.com/Microsoft/DirectXTex

HDR

• Open hemisphere_cube_32_glay.psd
• Resize to 128
• Hide sun layer
• Export as HDR
• Open in PTgui=>Tools=>Convert to QTVR/Cubic ** Choose Cylindrical ** Size 256, Cubeface strip 6x1, hdr ** Save
• Open in Photoshop again
• Fill the holes (bottom/top)
• Swap faces so that order is: Side, Side, Top, Bottom, Side, Side (Top and Bottom were at the end)
• Export to RGBA32 with NVIDIA DDS plugin
• Use texconv.exe to convert to F16: texconv.exe test128.dds -o converted -f R16G16B16A16_FLOAT -m 8

LDR

• Open hemisphere_cube_32_glay.psd
• Resize to 128
• Hide sun layer
• Photoshop: Image=>Mode=>8 Bits/Channel
  • When asked to merge layers, choose "Merge"
  • Choose "Exposure and Gamma" HDR toning method
• Export to RGB8 with NVIDIA DDS plugin
• Use texconv.exe to convert to BC7