Celestia Forums

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John,

hopefully, you don't apply cleaning-up manipulations to the normal map itself. This would surely destroy the required texel normalization constraint: r*r + g*g + b*b = 1! If this constraint is violated, the color-encoded gradient vector ceases to be normal to the surface...

Therefore, any such cleaning-up action has to be done before the normalmap has been calculated. I.e. at the (input) level of the 16bit elevation gray-map.

Fridger

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( takes 5 sec to run the 32k , gmic bug for running a 8 gig 64k tiff - causes a crash)

I rather guess that the gmic code is not made for such big textures (unlike my tools), and you are seing merely a lack of memory here in case of the 8 GB texture. I can easily work with 32k textures even on GIMP, but for 64k textures I need to optimize GIMP's cache tile size. Anyway, for >= 64k GIMP is dead slow (because it mainly uses the HD cache instead of RAM) and sometimes it crashes. I suspect that gmic suffers from the same general memory architecture and corresponding problems...

Fridger

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Can't wait to download that.

Great work, John.

Just in time for a Moon celebration! Thanks, John!

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Indeed. I checked the new normalmap quickly, and it's a good improvement. Besides what you showed, for example Schoedinger and other polar regions get benefitted. Also do straight shapes like Rupes Recta. Excellent normalmap.

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