Textures Moving When Not Suppose To

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hi,

i am doing my project and i encounter this error when i render my object out. Apparently the texture moves when it is not suppose to. ( after rendering a sequence of frames )
I tried using rest SOP but i think it didn't work or i did it the worng way.

I am doing cracking on the ground , thus i used an extrude node follow by rest SOP then UV texturing lastly adding a shader with displacement and texture.

Did i do it the wrong way?

Here is my scene file
and a low res render

Attachments:
ground cracking test.hipnc (1.5 MB)
moving cracks render.mov (3.7 MB)

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I tried opening your hip file but there are some issues with it as it was saved.

Looking through your sop chain, it seems that you are projecting uv's AFTER you animated your geo. If you instead project the uvs BEFORE the tiles move, the texture will stick to them correctly.

Best,

G

ps: on an unrelated note - I also noticed that you named one of your sops “_”. This is NOT a good idea. Not even sure why this is allowed.
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hi,

thanks for replying! it worked XD
I added in a rest SOP as well , heard it is resting the textures on them while they are deforming ,

now i got another problem. I am relativly new to houdini , is there any way to fix the ulgy side UV's ? i crack them and the sides are not really textured in the right way.

here is a render and my scene file again.

==================================
Oh btw the _ name is i accidentally pressed and changed it XD
was amazed that i never see it @.@ till you mentioned! thanks.

-booneng

Attachments:
test crack 2.mov (1.9 MB)
ground cracking test2.hipnc (1.5 MB)

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Looking at your file quickly, here are a few things:

1. You might want to use Poly extrude instead of extrude.
2. Extrude before you use the Break SOP. Always better to fracture closed objects. This will create a primitive group called “inside” that you can then UV separately.
3. Use whatever UV method to apply uv's to the “inside” group. Use space+5 to see what your UVs look like.
Francisco Rodriguez
Effects Animator | Walt Disney Animation Studios
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alrights thanks! you gave me the idea!
shall try it now!

-bhem
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