Hi, since I wanted to use DarkTheme I played around with TRMorph (since seeing giant white rectangle in dark theme is not very nice). What I have done is moved the background color setting to `surface clear:` (instead of the original aCanvas fillRectangle). And then if theme background luminance is dark (>0.5), I invert all the colors in the visualization. For dark theme the background is black, and not the theme background - at least to me it seems that black is much clearer. Is this something that could be incorporated? ​ And the modified code: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "protocol: drawing" TRMorph>>drawOn: aCanvas "aCanvas is a FormCanvas" self checkSession. "aCanvas fillRectangle: bounds color: trachelCanvas color." trachelCanvas playAnimations. "The drawing has to be done when a change in the shapes occured or when there is an animation." surface drawDuring: [:cs | surface clear: trachelCanvas color. "We display the elements that are subject to the camera" cs pathTransform translateBy: (self extent / 2) asFloatPoint; scaleBy: trachelCanvas camera scale asFloat; translateBy: trachelCanvas camera position negated asFloatPoint. trachelCanvas shapes do: [ :trachelShape | trachelShape drawOn: cs. ]. "We display the elements that are _NOT_ subject to the camera" cs pathTransform loadIdentity scaleBy: 1.001. trachelCanvas fixedShapes do: [ :trachelShape | trachelShape drawOn: cs. ]. ]. self theme backgroundColor luminance < 0.5 ifTrue: [ surface drawDuring: [ :cs | cs paintMode restoreAfter: [ cs setPaint: Color white. cs paintMode difference. cs drawShape: (0 @ 0 extent: surface extent) ] ] ]. "aCanvas translucentImage: surface asForm at: self bounds origin." "asForm creates a new Form, which is likely to be expensive. This can be cached" aCanvas image: surface asForm at: self bounds origin sourceRect: (0 @ 0 extent: surface extent) rule: 34. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~