I spent a few minutes messing about with build 128152. Assertions are turn off in this build BTW. Manually editing the terrain appears to me to respond quicker but not by a lot. But the changes are close to real time with perhaps a second of delay. Clearly it depends on the radius of the brush as that effects more terrain squares. I use using a 4m brush.
Smoothing the ground under selected track is not fast but you can apply it over a long line of track. Again the radius of the brush makes a big difference in speed. I used a 4m radius which is about the smallest the function will use to produce embankment with about a 45 degree slope and a rise of 2m on a length of track made up of three track segments. The track was about 350m in length. The smoothing function took about 1 minute to complete. Then I widened the radius to 30 m to get a much more gentle slope on the sides. This took close to 3 mins but considering that it involves at least 3 times the number of ground squares then the longer time is to be expected. At least you get a progress bar. I must say I am impressed with the quality of this function on HD terrain. Even with track laid at a diagonal the slope edges are smooth. No stairstep jaggies as seen with the 10m grid.
Edit: I had a bit more messing around and it appears the the setting of the Sensitivity greatly effects the speed of the Smoothing function and the same test as above at 50m radius and Sensitivity at 100% completed in about 30 seconds or a 6 times improvement in speed. The only visual difference seems to be that the ragged ends of the raised section at the ends of the track appears to be not as detailed as with Sensitivity at 5%. Interesting.
Smoothing the ground under selected track is not fast but you can apply it over a long line of track. Again the radius of the brush makes a big difference in speed. I used a 4m radius which is about the smallest the function will use to produce embankment with about a 45 degree slope and a rise of 2m on a length of track made up of three track segments. The track was about 350m in length. The smoothing function took about 1 minute to complete. Then I widened the radius to 30 m to get a much more gentle slope on the sides. This took close to 3 mins but considering that it involves at least 3 times the number of ground squares then the longer time is to be expected. At least you get a progress bar. I must say I am impressed with the quality of this function on HD terrain. Even with track laid at a diagonal the slope edges are smooth. No stairstep jaggies as seen with the 10m grid.
Edit: I had a bit more messing around and it appears the the setting of the Sensitivity greatly effects the speed of the Smoothing function and the same test as above at 50m radius and Sensitivity at 100% completed in about 30 seconds or a 6 times improvement in speed. The only visual difference seems to be that the ragged ends of the raised section at the ends of the track appears to be not as detailed as with Sensitivity at 5%. Interesting.
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