A.N.T. Landscape Addon not reproducible in some cases #113959

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Zeyu-Ma · 2023-10-20T04:17:24+02:00

Zeyu-Ma commented

2023-10-20 04:17:24 +02:00

The generated terrain is different for certain commands. Please don't say it is not a bug because in most cases the ant landscape does reproduce results. It is in those rare cases that the command does not reproduce. If reproducibility is not the goal, then it should not be reproducible most times, otherwise, you need to ensure it is reproducible. Otherwise, it is misleading.

System Information
Operating system: At least Linux and MacOS
Graphics card: Not related

Blender Version
Broken: all (newest 3.6.5 tested)
Worked: none

Short description of error

The generated terrain is different, as seen in the attached screenshot.

Exact steps for others to reproduce the error
open blender, run this command,

bpy.ops.mesh.landscape_add(ant_terrain_name="Landscape", land_material="", water_material="", texture_block="", at_cursor=True, smooth_mesh=True, tri_face=False, sphere_mesh=False, subdivision_x=512, subdivision_y=512, mesh_size=2, mesh_size_x=2, mesh_size_y=2, random_seed=0, water_plane=False, water_level=0.01, remove_double=False, show_main_settings=True, show_noise_settings=True, show_displace_settings=True, refresh=True, auto_refresh=True, noise_offset_x=0, noise_offset_y=0, noise_offset_z=0, noise_size_x=1, noise_size_y=1, noise_size_z=1, noise_size=1, noise_type='marble_noise', basis_type='BLENDER', vl_basis_type='PERLIN_ORIGINAL', distortion=1.5, hard_noise='0', noise_depth=8, amplitude=0.5, frequency=1.8, dimension=1, lacunarity=2, offset=1, gain=2, marble_bias='2', marble_sharp='3', marble_shape='1', height=0.6, height_invert=False, height_offset=0, fx_mixfactor=0, fx_mix_mode='1', fx_type='14', fx_bias='0', fx_turb=0.5, fx_depth=2, fx_amplitude=0.38, fx_frequency=1.5, fx_size=1.15, fx_loc_x=-1, fx_loc_y=1, fx_height=0.5, fx_invert=False, fx_offset=0.06, edge_falloff='3', falloff_x=2, falloff_y=2, edge_level=0, maximum=1, minimum=-1, vert_group="", strata=5, strata_type='0')

which is copied from output of blender when using Volcano preset in A.N.T. Landscape
Take a screenshot
Reopen blender,
do this again.

The generated terrain is different for certain commands. Please don't say it is not a bug because in most cases the ant landscape does reproduce results. It is in those rare cases that the command does not reproduce. If reproducibility is not the goal, then it should not be reproducible most times, otherwise, you need to ensure it is reproducible. Otherwise, it is misleading. **System Information** Operating system: At least Linux and MacOS Graphics card: Not related **Blender Version** Broken: all (newest 3.6.5 tested) Worked: none **Short description of error** The generated terrain is different, as seen in the attached screenshot. **Exact steps for others to reproduce the error** open blender, run this command, ``` bpy.ops.mesh.landscape_add(ant_terrain_name="Landscape", land_material="", water_material="", texture_block="", at_cursor=True, smooth_mesh=True, tri_face=False, sphere_mesh=False, subdivision_x=512, subdivision_y=512, mesh_size=2, mesh_size_x=2, mesh_size_y=2, random_seed=0, water_plane=False, water_level=0.01, remove_double=False, show_main_settings=True, show_noise_settings=True, show_displace_settings=True, refresh=True, auto_refresh=True, noise_offset_x=0, noise_offset_y=0, noise_offset_z=0, noise_size_x=1, noise_size_y=1, noise_size_z=1, noise_size=1, noise_type='marble_noise', basis_type='BLENDER', vl_basis_type='PERLIN_ORIGINAL', distortion=1.5, hard_noise='0', noise_depth=8, amplitude=0.5, frequency=1.8, dimension=1, lacunarity=2, offset=1, gain=2, marble_bias='2', marble_sharp='3', marble_shape='1', height=0.6, height_invert=False, height_offset=0, fx_mixfactor=0, fx_mix_mode='1', fx_type='14', fx_bias='0', fx_turb=0.5, fx_depth=2, fx_amplitude=0.38, fx_frequency=1.5, fx_size=1.15, fx_loc_x=-1, fx_loc_y=1, fx_height=0.5, fx_invert=False, fx_offset=0.06, edge_falloff='3', falloff_x=2, falloff_y=2, edge_level=0, maximum=1, minimum=-1, vert_group="", strata=5, strata_type='0') ``` which is copied from output of blender when using Volcano preset in A.N.T. Landscape Take a screenshot Reopen blender, do this again.

Screen Shot 2023-10-19 at 10.04.57 PM.png

7.9 MiB

Screen Shot 2023-10-19 at 10.04.29 PM.png

7.8 MiB

Screen Shot 2023-10-19 at 10.04.57 PM.png

Screen Shot 2023-10-19 at 10.04.29 PM.png

Zeyu-Ma added the

labels 2023-10-20 04:17:25 +02:00

Jesse Yurkovich commented

2023-10-20 05:07:48 +02:00

It looks like A.N.T treats the random_seed parameter with value 0 as special. Can you try setting that value to something other than 0, like 1, and see if you get consistent results across calls? It seems to work for me.

It looks like A.N.T treats the `random_seed` parameter with value `0` as special. Can you try setting that value to something other than 0, like 1, and see if you get consistent results across calls? It seems to work for me.

Jesse Yurkovich added

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labels 2023-10-20 05:07:58 +02:00

Zeyu-Ma commented

2023-10-20 05:12:40 +02:00

Good observation. In the initial test, it seems nonzero values work. However, in a bunch of jobs I run, I found some nonzero seeds are not reproducible, but some zero seeds are reproducible. Quite weird.

Zeyu-Ma commented

2023-10-20 05:13:35 +02:00

And to make things more weird. Only in volcano preset it happens. Nothing weird happens in all other presets I tried.

Jesse Yurkovich commented

2023-10-20 06:30:51 +02:00

I'm not able to reproduce such a problem. I tried various combinations of running other presets before volcano and things seem consistent here. We'll have to wait to see if anyone else has an idea of how to reproduce more reliably.

Jesse Yurkovich added

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labels 2023-10-20 06:31:00 +02:00

Zeyu-Ma commented

2023-10-20 06:44:01 +02:00

Sorry, to clarify, do you mean the issue of Volcano at seed 0 is not reproducible or issues other than that are not reproducible? Thanks for your investigation btw!

Jesse Yurkovich commented

2023-10-20 06:51:34 +02:00

Seeds of 0 will be different to each other, and that's expected, based on how the addon is coded. Setting a seed to something other than 0 always seems to produce a consistent pattern for me.

Zeyu-Ma commented

2023-10-20 07:38:14 +02:00

I see. I made a mistake when saying some nonzero seeds are not reproducible; my checking was wrong. For the seed 0, it does happen to be reproducible for some reason in some cases; I understand.
Now the question is just that is it misleading to make seed 0 specially not reproducible?

I see. I made a mistake when saying some nonzero seeds are not reproducible; my checking was wrong. For the seed 0, it does happen to be reproducible for some reason in some cases; I understand. Now the question is just that is it misleading to make seed 0 specially not reproducible?

Germano Cavalcante referenced this issue from blender/blender-addons

2023-10-23 15:53:02 +02:00

A.N.T. Landscape generates different results with the same settings #104972

Germano Cavalcante commented

2023-10-23 15:55:27 +02:00

Thanks for the report. However you had reported in the wrong repository. It should have been reported in the blender-addons repository instead of the blender repository.

Fortunately, I created another report there: blender/blender-addons#104972

Will close this one.

Thanks for the report. However you had reported in the wrong repository. It should have been reported in the [blender-addons](https://projects.blender.org/blender/blender-addons) repository instead of the [blender](https://projects.blender.org/blender/blender) repository. Fortunately, I created another report there: https://projects.blender.org/blender/blender-addons/issues/104972 Will close this one.

Germano Cavalcante closed this issue

2023-10-23 15:55:29 +02:00

Blender Bot added

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labels 2023-10-23 15:55:30 +02:00

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