Fix for blocky water and textures in FSX: Steam Edition with Orbx Global Base

Good find — and that file makes sense for this symptom

Yep, Iclookup.bgl is one of those “small file, big visual impact” items in FSX. When it’s mismatched/corrupt/overwritten by something older, you can get exactly what you described: blocky shoreline/water transitions and textures that look like they’re being “tiled” wrong or pasted in.

A couple of practical notes for anyone reading this later and wanting to do it cleanly:

1) Back up first
Before swapping anything in the FSX core folders, copy the original out somewhere safe (desktop, backup folder, etc). If you ever need to revert, you’ll be glad you did.

2) Confirm the file goes in the right place
It should land here (as you posted):
FSX\scenery\BASE\Scenery
…and the sim should only have one active copy of that filename in the base scenery paths.

3) Don’t forget the “last step” after changes
After replacing a core .BGL like this, it’s worth doing:

• Start FSX and let it rebuild scenery indexes if it prompts.
• Load a default flight in the problem area and give it 30–60 seconds to settle (FSX can take a moment to fully redraw after startup).

4) If it comes back later…
If the issue returns after another Orbx install/update, that’s usually a sign something re-overwrote the file again (or you ran a “repair” on FSX:SE, etc.). In that case, re-applying the known-good file is often the fix again.

Quick questions (so folks can compare notes):

• Were you running any other texture/environment products alongside Global Base (REX, Envtex, shader tools, etc.), or was it strictly Orbx?
• Did the blocky water show everywhere, or only in certain regions (coastal areas, lakes/rivers, specific add-on scenery)?
• Did Orbx have you run any Orbx tools/settings changes, or was it purely the Iclookup.bgl replacement?

Nice of you to post the outcome — this one will save someone a lot of time.