Ive gotten several requests to share an older work I made some time ago.. Terragen has gotten several updates since I made it, I thought it would be fun to re-make the whole thing into a new
version..
scene file here: http://www.planetside.co.uk/forums/index.php?topic=14513.new#new
You've given me a great hint on procedural crater generation, Freelancah! I've been trying to make some but I've been stuck on how to make the voronoi cells round. This method is basically just like blowing out the white colour of the function and just re-adjusting the low colour, it's just went right by me. It's great, one simple function can be followed by a couple of transform shaders at half and quarter scale and it gives a good variety in size and also appears nice and random. I've been trying to make things really more complicated than they need to be, as usual.
Cheers! :)
The transform shader is a very good idea, must test that out now! Also for anyone else attempting this, note that the "get position from geometry" needs to be swapped to "get position from texture" for transforms to work
edit: also its probably a good idea to play with the values of the voronoi vector scales. When there is a difference in the values the scales change a bit
Yup. I actually wondered why you'd used get position in geometry.
After having a look at your .tgd I tried it myself using a single Voronoi network(I think you've got a bit more complicated functions going on than that though) to create 250 metre cells, using that plus its own rescaled transforms is perfect for a crater outline. Adding a rim is a bit more work but it's really what this method is missing, I'll play around with it again later too. Thanks again for the enlightenment! :)
I have an idea how to make a rim..be right back..
wow !!! excellent scene
Quote from: freelancah on May 08, 2012, 06:30:31 PM
I have an idea how to make a rim..be right back..
Hee hee, me to...
It's currently kinda problematic but it seems possible
forgot the last one
Bingo! Nice one. Break up that last one with some fractal and it's all there.
Here's the clipfile.. It's definitely not the only way but just happened to be the first one I tested :P
QuoteHee hee, me to...
Like little kiddies in the Terragen Lolly Shop............................. ;D
Thanks again, Freelancah...............
DandelO - did you have another idea regarding the crater rim?
Nice image and nice thread :)
Great stuff!
excellent image, Freelancah
Quote from: Erwin0265 on May 08, 2012, 07:36:56 PM
QuoteHee hee, me to...
DandelO - did you have another idea regarding the crater rim?
No, not really, nothing that Freelancah hasn't already done here. Great thread, great image and great tips. It certainly simplifies a crater related headache I was having recently. Cheers, FL! :)
Hello,
Got a chance to try and play with this.
I am tripped up by the ring.
1) Why is the center of the asteroids ring not the center of the planet object?
2) Is there any reason I cannot or should not up the count on the debris ring?
3) is it all right to copy what you have done here, freelancah... And make changes and use it in my own work. I mean, what are you sharing here, the file, or the method... what is my permissions here????
Old thread but just wanted to comment on the question asked by TheBadger: yeah copy away and show us new findings!
Great image would make a superb animation.