I've been working on a chronology series of the before and after eruption. Here are a few after. Still working on pre May, 1980 eruption terrain data.
Forgot this one
Very nice! The snow work looks really well done. Is that provided by maps or is it by slopes/intersections?
Though I would like to point out then lower slopes and surrounding terrain of Mt. St Helens has very little tree cover. Few patches of slow growing trees due to the soil quality. The forests have been erased, replaced with shrub and grassland.
Beautiful pictures !
Good work on these! Nice to see some big renders here as well.
Wow, great! These are very natural renderings.
Really extremely natural and authentic (I don't know the real view :) )
Thanks for the comments folks!
WAS I do realize that the forests were decimated. I should have named it 100 years later. 😀
The snow is completely procedural, no image maps. The terrain being a 1 Meter DEM made the snow shader really easy to work with and conform to the terrain naturally with all the detail. I cannot say the same for the pre eruption terrain. I have the features looking much better and recognizable at least but getting snow to conform naturally is a struggle.
Thanks again for the nice comments. I will post a render of the pre May 1980 render when I'm further along.
Which pre-eruption DEM are you using? I think the issue with those dems is the slices of elevation data have gaps between them, and when stitched it just fades between them, so the mountain has odd lateral terracing effects that aren't real. I think I was able go make one look a bit better with daniil's erosion.
Quote from: WAS on October 31, 2021, 01:57:56 PMWhich pre-eruption DEM are you using? I think the issue with those dems is the slices of elevation data have gaps between them, and when stitched it just fades between them, so the mountain has odd lateral terracing effects that aren't real. I think I was able go make one look a bit better with daniil's erosion.
WAS that is exactly the issue. I have been tweaking the mountain with Classic Erosion, very subtly to try and erode the lateral ridges while trying to keep the features (which are barely there) intact. I'll post a barebones example of what I'm working with. I cannot believe finding a decent dem of this time is so hard. I know a much better one is out there I have seen greyscale and hill shade.
It says May 16, 1980 LIDAR but looking closer it does have some of those lateral ridges but this is much better quality with more details than what I have.
https://www.flickr.com/photos/rosenow_photography/51609568270/ (https://www.flickr.com/photos/rosenow_photography/51609568270/)
This is what I'm trying to work with.
Oh that does look pretty nice. Not that one I am using I don't think. I have a project I wanted yo animate, from pre-eruption to post-eruption. Never got around to it, but may have a go. My issue is making the lower quality old dem to match the new one.
But I see he updated his pre eruption dem and it seems to be a mix of post and pre so quality is much better. He didn't update the image but the file is newer and better quality: http://gis.ess.washington.edu/data/raster/thirtymeter/mtsthelens/index.html
Quote from: WAS on October 31, 2021, 02:47:41 PMOh that does look pretty nice. Not that one I am using I don't think. I have a project I wanted yo animate, from pre-eruption to post-eruption. Never got around to it, but may have a go. My issue is making the lower quality old dem to match the new one.
But I see he updated his pre eruption dem and it seems to be a mix of post and pre so quality is much better. He didn't update the image but the file is newer and better quality: http://gis.ess.washington.edu/data/raster/thirtymeter/mtsthelens/index.html
That is indeed the data I'm working with from your link. I seen a nice quality from a student at university that was able to track down the camera make and corresponding details from the aerial images shot days before the eruption. He compiled a nice terrain with Structure from Motion.
I would LOVE to see you animate the your pre to post animation when you finish. I had a similar idea but I'm nowhere near there yet with my knowledge of TG. 😀
My issue so far is getting daniil's plugin to play nicely. Currently it seems no matter how low I go on down cutting, it still wants to really cut deep into the mountain. I just want it to a accent what smaller detail erosion would be missing from detail. I may actually have to use a series of erosions and masks used as intensity to defeat my issue.
Quote from: WAS on October 31, 2021, 04:04:08 PMMy issue so far is getting daniil's plugin to play nicely. Currently it seems no matter how low I go on down cutting, it still wants to really cut deep into the mountain. I just want it to a accent what smaller detail erosion would be missing from detail. I may actually have to use a series of erosions and masks used as intensity to defeat my issue.
That might indeed be the way to go. That's how I've been playing it today. Painted shader for erosion mask. Slow tedious process but I'm getting good results. The snow still doesn't look right even if the terrain does.
I guess the terrain is too rough to begin with for snow. You may need to smooth the heightmap in PS, and make a combi in TG.
Great work!
Quote from: Dune on November 01, 2021, 02:24:04 AMI guess the terrain is too rough to begin with for snow. You may need to smooth the heightmap in PS, and make a combi in TG.
Hello Dune!
Can you explain the "Combine in TG" part? Not sure how you mean.
You can mask the slightly smoothed terrain tiff by the snowmask you have, and thus combine rough and smooth heightmaps in a merge shader, or (blue node) mix color/scalar and make that combination displace the ground. Then use the same mask to add a surface layer for snow, and if all works well it should only mask the smoothed areas.
Quote from: Dune on November 01, 2021, 09:12:27 AMYou can mask the slightly smoothed terrain tiff by the snowmask you have, and thus combine rough and smooth heightmaps in a merge shader, or (blue node) mix color/scalar and make that combination displace the ground. Then use the same mask to add a surface layer for snow, and if all works well it should only mask the smoothed areas.
Interesting idea! I shall have a crack at this method! Thanks for the knowledge Dune!
You can also use Daniil's Thermal Erosion, the C formula with some smoothing. Least I think you can. Testing quickly now.
Very nice work.
I like especially the first two images.
Thanks
@Kadri!
Yeah I think the pre eruption is going to have to go back on the shelf until I gain more knowledge with TG. here is as far as I made it and as you can see it's just not right.