Most of this is edited in the data folder files. Its easier to set the collision model with the AC files. Edit the position in the collision.ini file.I've been at work fixing serious issues with the 90s NASCAR mod and right now I'm having to make serious adjustments to the Ford Thunderbird. It required scaling down from an inaccurate 2.925m wheelbase to a much more accurate 2.87 and a handful of model edits. Unfortunately, I'm not very experienced with modding for Assetto Corsa and as such I'm having issues with some of it's concepts.
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My current problem lies is that the model and empties are all off from the collision model at the orgin, but when I try to select them it doesn't allow me to move anything that isn't a mesh, like WHEEL_LF, WHEEL_RF etc. When these objects are selected I cannot leave Object mode and thus any movement doesn't translate.
Secondly as can be seen in the render in CM Showroom, this is what the product looks like, on top of it being sunken and offset, the glass is completely opaque, can someone explain what I'm doing wrong?
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As for the wheel positions, you need to edit the suspension.ini file, adjust the body height with the BASEY numbers and then move the wheel positions with the WHEEL and SUSP figures near the bottom of that file.
As for the glass, it needs to be set as AlphaBlend in kseditor, you can do it in CM showroom as well to see if it works first / get the settings you want, but better to set it in kseditor in the long term.