Quote from: Tangled-Universe on May 08, 2008, 01:08:06 PM
So in conclusion I'd have to paint a mask then resize it to a square image and then resize it back in TG2 using those factors?
The mask doesn't need to be a square image, it can be whatever size you want. You probably want it to have the same aspect ratio as your projection (4/3 for example) so that you have roughly square pixels after all the projections have been setup correctly. None of that will affect how large the image appears in Terragen, however, because that depends on the projection settings.
In summary, the size of your image map in Photoshop makes no difference to how much of the screen it covers in TG, only how much resolution you get from the image.
Terragen then takes that image and maps it to an area which you specify. It would cover the same area even if you only painted a 1x1 pixel image. It's important for a renderer to be independent of texture resolution like this.
For front projection, let Terragen figure out the render aspect ratio and leave the projection size setting at 1 1. To do this you need to leave the camera connection empty. For projections which need to use a different camera, you'll need to tell the Image Map Shader what the projection size is, because the camera is assumed to project a square field of view. 1 1 would project a square. Usually if you are projecting from some other direction you have different needs anyway, so you would need to think about your aspect ratio more carefully.
Matt