Brush Mapping Question
12 messages in this thread
Hi all,
I just got Imagine last week, and I've been playing with it all weekend. So
far, I've created a 3-d logo, but I've run into a problem.
The logo is supposed to be red on the front & back (which are flat) and
white everywhere else. I figured the way to do this is by setting the
colour of the object to white and then import a red brush and use brush
mapping to map the red onto the front and back.
However, I can't seem to get it to work. I end up with spots of red in the
object but not over the whole fron & back planes.
Is this the right approach?
Or is there a way to select faces that have all their edges along one axis?
I tried selecting faces by using the box method, but it selects all the
faces behind the front face as well, which ends up being the whole object –
I only wanted to select the faces along the front plane – then I could have
changed their colour to red.
Any help is appreciated – thanks.
Allan
allen,
you might try posting this in the impulse forum over in
amigavendor, Rick, who chairs (keyboards?manages?) the forum is very
knowledgeable on imagine, to say the least (he wrote the manuals). Also
the impulse libraries in that forum have a file on texture and brush
mapping that should help you a lot. (keywords texture or brushmap should
get you there.) I haven't worked much with the texture or brushmaps myself,
they are a little tricky. Try placing the plane of the map just above the
face of the object and make sure the y axis is at minimum depth. You can
do this under the "edit axis" requester when you're defining the map. Also,
make sure that the center of your maps axis is positioned to the lower left
of the object. I always get "interesting" results when I try mapping, so
I'm not sure what my advice is worth, fortunetly there's plenty of people
around to help out, so good luck.
-david
David,
Thanks for the suggestions. I'll try your idea about putting the brush axis
off-center from the object – I had tried it by lining it up wit the
object's axis.
Also I'll check out the Impulse area in AnigaVendor.
Allan
Also, make sure that your object (the one to be wrapped) is in the uadrant
of x,y and z. Make sure that you scale the brush axis in Local (L) mode
(it doesn't come up automatically) and that the bounding box in the
positive quadrant surrounds your object. Look for the file on wrapping for
more help. It's here somewhere.
Peter
Peter,
Thanks for the tips, and I'll dig up that file that's been mentioned.
I also got my copy of Imagine Companion today, so maybe it'll help some by
working thru the the tutorials.
Allan
Sounds like you'll be on your way – good luck, and let me know how it
goes…
Peter
Peter,
I've seen this before, but never got around to ask. Why must one scale
the brush axes in Local mode rather than World mode? Only reason I would
see is for it to work with any object, even one whose axes have been
rotated. So far my objects have all had their orientation kept at (0,0,0),
which makes things easier once in the stage editor. In such a case, scaling
along World and Local settings would be the same.
Blaq! – via Whap!
Gee Charles, how many amigas will fit on the head of a pin? 🙂
Why do you need to do local mode scaling/rotating, even when everything is
at 0,0,0? Don't know. Never read any explanation. Never really pondered
it before, tho. No idea. Just do it.
Sounds like a good excuse to call Impulse and ask about it. Let us ALL
know, ok? 🙂
–jp–seattle–
Charles,
Seems to me that once you've rotated an object off the default position,
if you try to map a brush to it in world, it won't "hit" it right. Haven't
tried this, but think I read it somewhere.
Karl
– via Whap!
I think it's a good old fashioned "bug" in the Imagine software
-Roger
Allan,
if you get speckled or mottled results from a brush, check to see that
the brush does not lie directly at the object's edge, but rather floats
just a bit off it; moving the brush .01 units away from the surface is OK.
As far as selecting all the faces making up the front of your logo, simply
drag the mouse in the TOP view. This will pick up the front faces without
anything else. For more complicated situations, I believe you could use
Hide Points to temporarily disable parts of your object that get picked up
against your will. Once you've isolated the area you want and have
performed the desired operation, you can return to Pick Objects or Pick
Groups and click to make the whole object visible again.
Blaq! – via Whap!
Charles,
Thanks for the advice, I had been laying the brushon the edge of the object
– I'll try moving it off as you suggested.
Also, using the top view to do the drag select is the obvious answer!
Thanks, I'll try it! I find my biggest problem when working with Imagine is
that I'm still thinking in 2-d a lot of the time!
Allan