TYPO3 Image max width based on column position - typo3

Question

I am trying to get the max image width in column 0 to be larger than the default. But I can't get it to work... can anyone help?
This is my (not working) typoscript I have so far:
temp.mW < tt_content.image.20.maxW
tt_content.image.20.maxW >
tt_content.image.20.maxW.cObject = CASE
tt_content.image.20.maxW.cObject {
key.field=colPos
default < temp.mW
0 = TEXT
0.value = 1920
}

Answer 1

I have just found that I had it right, but I also needed to overwrite the override to get it to work:
temp.mW < tt_content.image.20.maxW
tt_content.image.20.maxW >
tt_content.image.20.maxW.cObject = CASE
tt_content.image.20.maxW.cObject {
key.field=colPos
default < temp.mW
0 = TEXT
0.value = 1920
0.override = TEXT
0.override.value = 1920
}

Answer 2

If you are using css_styled_content, here is my solution. Ensure to define also maxWInText.
### max width for each column
tt_content {
# Define max image width of contentelements type=images, for each content column separately
image.20.maxW.cObject = CASE
image.20.maxW.cObject {
key.field = colPos
# 900px - padding (2 x 30px)
default = TEXT
default.value = 840
# normal
0 = TEXT
0 < .default
# left
1 = TEXT
1.value = 165
# right
2 = TEXT
2.value = 155
# 3 border
}
# Define max image width of contentelements type=textWithImages, for each content column separately
/**
* !NOTE:
* This value is simply half the size of tt_content.image.20.maxW.cObject
* Here or otherwise, typoscript prioriCalc can be used to simply halve the values of tt_content.image.20.maxW.
*/
image.20.maxWInText.cObject = CASE
image.20.maxWInText.cObject {
key.field = colPos
default = TEXT
# 1/2 of 900px - padding (2 x 30px)
default.value = 390
# normal
0 = TEXT
0 < .default
# left
1 = TEXT
1.value = 82
# right
2 = TEXT
2.value = 77
# 3 border
}
}

Answer 3

Normally you would create a content object this way:
content_colPos_0 < styles.content.get
If no renderObj is given than the default tt_content is used, but you can set it yourself and overwrite what you need:
content_colPos_0 < styles.content.get
content_colPos_0 {
renderObj < tt_content
renderObj.image.20.maxW = 100
}
Your solution works as well