Ok - I have gotten a little bit further. Below is the explanation from Der_planner in princip how to do it:
making textures for cad programs needs a lot of steps. The tif-picture in your upload cannot be used as it is, please look at the attachment. I just took it as is is, to show you, that the "tiles" are not automatically seamless. The boards are not parallel, colour and brigtness change from left to right, and from top to bottom. You can work it out with Paint Shop Pro, you have the same program as I have. ![]()
- rotate the picture, until the boards are exactly straight
- cut out one single board
- devide the picture in the horizontal middle, push the upper part to bottom and the bottom part to the top, so the tiles will be exactly fit
- in the middle of the picture will be a seam, repair it, until it is no more visible
- copy the picture, and set as many boards beside an other, as you need on 1 meter
- stretch the picture in height, to get a square format
- resize it to 512x512 pixel, and use it as a seamless texture for 1x1 meter tiles
- for more colours, take the result picture, change the colour and save it as a new file.
Now in above explanation, he is using a picture of one complete panel. I decided to go around it a little bit differently and use the picture I've got, with a section of one panel (like the examples I posted above). After a little bit trial and error I did something like this:
- First I had to find a photoediting software that can rotate the picture less than 1 degree. Because my old Paint Shop Pro cannot do that. My choice was the free version of "PhotoFiltre".
- I used Photofiltre to rotate the image so boards are completely vertical - in small increments each time.
- Then I cut out one panel, by cutting in the middle of the tongue and groove connection.
- After trial and error, in Paint Shop Pro, I made a new image 512x512.
- The image of the one board was then resized to 512/8,3333 in the width and 512 in the height (pixels).
- Then - in Paint Shop Pro - I copied this image and inserted it into the 512x512 image.
- Did that 9 times, until the 512x512 pixels image was filled - being careful to position each boards, very next to each other. The last board was automatically "cut" to 0,3333 of board width - because the image was set to 512x512.
- Then I saved to bmp.
Now I thought I could use PhotoFiltre to change the colors acc. to the CMYK scales I was given for the different colors. But I didn't understand how - or the program does not have the appropriate function to do it. Also in Paint Shop Pro 7 (old yes), it looks like I cannot do it. It looks like it works in RGB. Well there is also some CMY and a possibility to split in CMYK layers. But the result is that I don't understand how to change the colors.
The below images, shows my texture tile file, the inside wall with textures and edges - so you can see where the single 600 mm panel is, and without textures and edges - seamless wall surface.
So I have gotten quite far - just need the colors changed. And I am not sure how to do that.