Displace modifier ignores 'Simple' subdivision if scale is unapplied #48814

New Issue

Ray Mairlot · 2016-07-08T19:43:19+02:00

Ray Mairlot commented

2016-07-08 19:43:19 +02:00

System Information
Windows 10 64-bit, Nvidia gtx 570 (render), Nvidia gt 610 (display)

Blender Version
Broken: 2.77a, a92fc34
Worked: -

Short description of error

The displace modifier ignores the Subsurf modifier if the Subsurf's subdivision type is set to 'Simple' and the scale on the object is unapplied. I understand applying scale is often important for modifiers to work correctly, but what threw me off was the fact that normal 'Catmull-Clark' subdivision works fine but 'Simple' shows no effect at all.

Exact steps for others to reproduce the error

Open displaceIgnoresSimpleSubdivision.blend
Switch the 'Subsurf' modifier's subdivision type from 'Simple' (no effect) to 'Catmull-Clark' to see the effects of the Displace modifier.

**System Information** Windows 10 64-bit, Nvidia gtx 570 (render), Nvidia gt 610 (display) **Blender Version** Broken: 2.77a, a92fc34 Worked: - **Short description of error** The displace modifier ignores the Subsurf modifier if the Subsurf's subdivision type is set to 'Simple' and the scale on the object is unapplied. I understand applying scale is often important for modifiers to work correctly, but what threw me off was the fact that normal 'Catmull-Clark' subdivision works fine but 'Simple' shows no effect at all. **Exact steps for others to reproduce the error** 1. Open [displaceIgnoresSimpleSubdivision.blend](https://archive.blender.org/developer/F320388/displaceIgnoresSimpleSubdivision.blend) 2. Switch the 'Subsurf' modifier's subdivision type from 'Simple' (no effect) to 'Catmull-Clark' to see the effects of the Displace modifier.

Ray Mairlot commented

2016-07-08 19:43:20 +02:00

Changed status to: 'Open'

Ray Mairlot commented

2016-07-08 19:43:20 +02:00

Added subscriber: @RayMairlot

Philipp Oeser commented

2016-07-10 12:21:36 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2016-07-10 12:21:36 +02:00

I think this is not a bug, just the cloud procedural giving those zero values at those local coords...
Will double check in a bit...

I think this is not a bug, just the cloud procedural giving those zero values at those local coords... Will double check in a bit...

Philipp Oeser commented

2016-07-10 12:51:29 +02:00

Yep, looks like clouds procderural at scale 1 will give output values of .5 at corners [0,0], [0,1], [1,1], [1,0]

So no displacement there
file from report uses clouds at scale .25 which will give no displacement at all vertices even at subd level 2 or 3.

havent looked at the actual code but some other things to try:

try subdividing further and displacement will show up
try translating vertices in editmode and displacement will show up
try using global coords in displace modifier and displacement will show up
try any other procedural [voronoi or something] and displacement will show up
try altering the colors of the cloud procedural with a ramp and displacement will show up

Yep, looks like clouds procderural at scale 1 will give output values of .5 at corners [0,0], [0,1], [1,1], [1,0] - > So no displacement there file from report uses clouds at scale .25 which will give no displacement at all vertices even at subd level 2 or 3. havent looked at the actual code but some other things to try: - try subdividing further and displacement will show up - try translating vertices in editmode and displacement will show up - try using global coords in displace modifier and displacement will show up - try any other procedural [voronoi or something] and displacement will show up - try altering the colors of the cloud procedural with a ramp and displacement will show up

Bastien Montagne commented

2016-07-10 20:26:24 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2016-07-10 20:26:24 +02:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2016-07-10 20:26:24 +02:00

Bastien Montagne self-assigned this 2016-07-10 20:26:24 +02:00

Bastien Montagne commented

2016-07-10 20:26:24 +02:00

Can totally confirm @lichtwerk diagnostic here… No bug at all, just odd effect of procedural textures!

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Displace modifier ignores 'Simple' subdivision if scale is unapplied #48814