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Thread: Blender Hints and Tips

  1. #1
    Administrator Redrobes's Avatar
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    Dec 2007
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    Post Blender Hints and Tips

    I am starting this thread because I am messing about with blender so if there is the off chance that other people can add to this pool that would be great but to start with ill add some things that I have discovered in the hope that they can be of some help.

    After Bryguy told me about the built in scripts there was an impressive one amongst them which is the Poly Reducer - also known as a decimator. Well this is a very important tool for me and although I have several in various guises on my machine the built in one seemed to do a good job and didnt need me to export and re-import an object so that's very cool.

    One of the things I was trying to do was clean up a section of a model which had too many polys in it so I selected that area and set the poly reducer on it and found that it reduced the whole model. Whaaaa my dummy went out of the pram again. I oscillate between hating this app and loving it. So back to google to see if I missed something and it turns out that blender cant poly reduce a selection.

    Almost by chance tho I found a little tutorial which is a bit terse about this thing called the vertex weight painter and it meant that I had to get out of my pram and pick up my dummy cos its really good.

    If you have a model with lots of verticees and faces in it like the monkey subdivided a few times (left image), you can go to a mode called the 'Weight Paint' above the object mode and edit mode at the top of that list.

    The monkey comes up blue but where you paint with the mouse it goes red. So I have painted a cross of the head of him.

    Now when you go to the poly reduce script there is a button to say 'VGroup Weightin'. What that means is that its going to add the weighting from the paint to the calculations for which faces to remove.

    So once it has finished it comes out like the right image where the areas painted in blue get reduced a lot and those that were painted red get reduced not a lot.

    Now that is back to front as far as I am concerned as a high weighting usually means a lot. But in a decimation the area of the poly is used as a means to say whether it should be zapped so small areas get zapped and large areas do not. So high weights mean keep them.

    Otherwise for other kinds of operation which use it its done normally where a high weight means do it more.

    Also note that you should assign the weight paint job to a vertex group instead of the default group but I didnt bother because my object had no groups in it.

    Pretty cool huh ? I am back to loving this app again.

  2. #2
    Guild Adept bryguy's Avatar
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    Jul 2008
    In my own little world =D


    lol thats totally cool! Although for me, where ever i paint it goes from dark blue, to light blue, to green, to yellow, to orange, to red, to dark red. Oh well

    Hey! this reminds me of something I figured out about actually coloring your object!

    Basically, for it to work, you first have to go to Vertex Paint mode with your object select. Then in the buttons screen there should be a little section titled Paint. Just change the color to your liking, adjust the opacity and size, and then give your image basic colors. If you go back to object mode, it wont show your coloring, but its still there!

    If you want your coloring to render with your image, then with your object selected, in object mode, under Link and Materials in the buttons screen, under materials, choose new to create a new material and then click assign. Now hit (in the panels are in the buttons screen) the little round ball. Under a little area named Material, click the VCol Paint button. Now go to Render: Current Frame. Your object should now be colored! If not, try again, took me a couple of tries to figure it out completely.

    lol heres my monkey
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    "When I use a word," Humpty Dumpty said in a rather scornful tone," it means just what I choose it to mean -- neither more nor less."
    "The question is," said Alice, "whether you can make words mean so many things."

    "The question is," said Humpty Dumpty, "which is to be master -- that's all."

    -Lewis Carrol: Through the Looking Glass

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