GPU Instancing: Trees rotation/ z placement wrong

[bertt]

When usig GPU Instancing with model 'tree.glb' (see testfixtures tree.glb), the trees are rotated wrong:

Workaround: Set column Pitch to 1.57079632679

update traffic_signs_instances set pitch = 1.57079632679

Notice there is another issue about correcting the z values.

Workaround: Add about ?4? meter to z:

update traffic_signs_instances set geom1 = ST_translate(st_force3d(geom),0,0,4.0)

Trees are now placed correctly

Todo: Check formulas for rotation/z values

[bertt]

Issue: The tree model has 5 nodes in defaultscene, the root node has a rotation but it's not taken into account.

[bertt]

won't fix now