Rendering Animation with object matrix output transforms continuously #1848
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I bake the action to an empty which is at the root position of my sword. I want to create a trail for which I delay the actions of that empty onto several other empties which function as hooks for the trail plane. This is my node setup: To reduce manual effort I translate them using an offset matrix node (with translation mode set to local). This is needed to translate the empties to the tip and the middle of the sword. Everything seems to work, but when I enable motion blur and render (both cycles and Eevee have this problem) the empties which I transformed fly away as can be seen here. This also happens without motionblur when rendering the animation, which makes this unusable. EDIT: Another thing I discovered: when rendering in viewport and clicking somewhere in the viewport, they also everytime I click fly away one step. |
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Replies: 4 comments 6 replies
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Can you share a minimal file that reproduces the issue? |
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mesh blur bug.zip |
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The issue is that you are setting the location of objects, reading their locations right after, then setting their location again. This is unreliable because Blender only updates the scene after AN finishes executing entirely. So you should generally set the location of objects only once and not read them again in the node tree. (There is a workaround, but using it is highly discouraged!) The best way to do what you want is to use the newly added Evaluate FCurves Transforms node as follows:
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Am I doing something wrong? |
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I do not understand... I went to Loop input and clicked on list generator to create a matrix list and I connected it with the evaluate FCurves Transforms node. Isn't this what you also did in the screenshot? |
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@Chryfi I mean connect the FCurves list parameter of the loop input node to the FCurves evaluate node. |
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Sorry for the late replay. I made it work now, you were right, however.... now the delay is.... not delayed but in the future? I dont know how to properly describe it, see for yourself |
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Okay I think I got the hang of it, is this correct? I multiply the offset by -1 to get a delay? |
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@Chryfi Yes, multiplying by a negative factor is the right choice here. |
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The issue is that you are setting the location of objects, reading their locations right after, then setting their location again. This is unreliable because Blender only updates the scene after AN finishes executing entirely. So you should generally set the location of objects only once and not read them again in the node tree. (There is a workaround, but using it is highly discouraged!)
The best way to do what you want is to use the newly added Evaluate FCurves Transforms node as follows: