segment resolution at 1:1

[Aussie John]

Have I run into a limitation of archicad at 1:1 scale where curves have poor segmentation in 3D. The 'column" in the screenshot is 14mm diameter. Or can I adjust the segmentation somewhere? Thanks John

[Erwin Edel]

Only by converting it to a morph and then increasing segmentation, assuming after converting to morph it is still trying to be a cylinder and not some 8-10 sided shape.

[Barry Kelly]

It has nothing to do with the scale.
Although you can set the scale in 3D, it will make no difference.
It is a limitation in Archicad that when a column gets a smaller diameter, the segmentation reduces.

If you draw a circle the same diameter and magic wand a slab to it, you will find that the segmentation is fine.

Barry.

[Daniel Kovacs]

Hi John,

Unfortunately you cannot control the segmentation, it is hardwired into ARCHICAD. The rule it uses is that the distance between the true arc and the chords cannot be bigger than 1 mm, and the number of segments has to be at least 8 (so if the arc was so tiny that based on the 1 mm rule it would have eg. 5 sides, then it generates the arc with 8 segments instead).

Converting the column to morph and increasing the number of curve segments can be a workaround if 1mm accuracy is not enough, but more detailed segmentation can significantly increase the polygon count of the model (and it would also not behave as a column anymore).

Regards,

[Aussie John]

for info I changed the working units to metres instead of mm. Ill try to reduce the scale in the stl export.