spherical texturing

[Per-Anders]

well photoshop can help you! two filters are immdiately what you need for spherical maps, and they are Polar Co-ordinates, and Shear... shear is the odd one out here, it's really personal preference, but you will need something to move your image, and wrap around so that you can see your image edges. anyhow onwards

ok to start blurring the edges, several ways to go including making a feathered selection and copying and pasting this around, using teh new pattern making stuff in photoshop, or the traditional way as follows. go to shear, and set both top and bottom points of the shear as far left as possible, make sure that the edge pixels "wrap around" and that the shear line has only the top and bottom points asn is straight (we dont want distortion. apply the filter.

you should now see the edge of your material brought accross into the screen, and wrapped around so you can begin to blur it but wait... what if you want to blur the top and bottom too? simply rotate the image 90 degrees and shear it again, you should see top,btoom, left and right edges all ready and waiting for you to blur/use the rubber stamp(clone) tool on as much as you want. now having blurred it all you should go back and do a shear again at 90 degrees to the last shear (to whichever sides you need), now just blur the single points that were on the edges, dont go to the actual edge of the canvas otherwise you will have to repeat again to get rid of any harsh edges. next you simple shear in the opposite direction, (rotating backwards as needs be, however many times is needed) till you get back to where you were at teh beginning, only with a nicely blended edge.

now polar co-ordinates. you have a texture you want on your sphere but you don't want there to be nasty pinching at the top and bottom, do the following. do polar coordiantes, and change the settings to be Rectangular to Polar. Now you should find your image all spherised around the top edge, just blend away till you get te result you're after in terms of what you want to see when you look down onto your object. next bring the texture back, so a polar to coordinates again and this time to polar to rectangular, your image should re-appear suitably blurred at the top, now rotate your convas 180 degrees, and repeat the process to blur the bottom of your sphere.

hope that this helps or at least gives you some ideas.

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.