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- Windows 10 64-bit (64.0 GB RAM - Intel Xeon W-2133 CPU @ 3.60GHz)
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Can you share some data so I can show you how to do this?
Essentially you can colourise the underlying terrain with your combined terrain that is showing the difference. The key to doing this is via the Options > Display tab for the combined terrain that is sitting on top. On the Display tab choose the Multiple Blend Mode then choose your custom shader via the Shader drop-down and finally turn off the Use Global Enable/Disable Hill Shading Option and Use Hill Shading for this layer. What this does is to turn off the hill shading effect for the layer and to use the shader colours to colourise the existing hill shade used on the underlying terrain.
Note that the main shader should be Daylight but probably best to change the Background Color for the shader via Configuration (wrench icon) > Shader Options > Surface Color. Personally I'd go for white but you could choose that delicious green from the image above!
P.S. I assume you work in a Mining like me judging by the screenshot.
I tried a workaround with partial success. I converted the parcels to line features first, then created a small buffer from the lake polygon with a 0.1m offset (could be less though). I used this buffer with the Crop command to remove the lines outside the buffer. This leaves just the lines you need but with the 0.2m additional length per line. The only issue was that there were a few lines that were split for some reason.